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Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony...

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n T = T (F ) F r 1 ,r 2 ,...,r n
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Page 1: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

❱♥tt ♦r s ♥ Pr♦r♠♥ st♠t♦rs ♥♥ ♥t♦♥s

P

♥t♦♥② rsts ♦s rt♥ ♥② ❩♥

♣r

strt

♥♥♥t♦♥s ♣ P ♦♠♣ts t ♥♥ ♥t♦♥s ♦r rs ♥ ♣r♦r♠♥st♠t♦rs s ♦♥ t rtr♥s ♦ ♥ ssts ♦r r♦♣s ♦ ssts t ttr ♦r ①♠♣ ♥ t♦♥t①t ♦ ♥ ♥st♠♥t ♣♦rt♦♦ s ♥t rs ♦ t ♣ trts rs st♠t♦rs ♥ s♥♣r♦r♠♥ st♠t♦rs ♥♥ ♠♦♥t ♦trs t st♥r t♦♥ t rs ①♣t s♦rtr♣ rt♦ ♦rt♥♦ rt♦ st♠t♦rs ♥♥ ♥t♦♥ ♦ rs ♦r ♣r♦r♠♥ st♠t♦r ♣r♦s ss ♦r ♦♠♣t♥ ♥ st♠t ♦ t ♥ts♠♣ st♥r rr♦r ♥ rtr♥s r sr② ♥♦rrt♥ s♦ ♥ t rtr♥s r sr② ♦rrt s sss ♥ ♥ ♥ rt♥ ❬❪ s P

♣ s s ♥ t ♣ P t♦ ♦♠♣t t t♠ srs ♦ ♥♥ ♥t♦♥ tr♥s♦r♠ rtr♥s♥ t♦ ♦♠♣t t st♥r rr♦rs ♦ rs ♥ ♣r♦r♠♥ st♠t♦rs

♥♥ ♥t♦♥s ♦rt r♦♥

♥♥ ♥t♦♥s ♣ P ♠s s ♦ t ♥t♦♥ ♥ t♦r② ♦ ♥♥ ♥t♦♥s ♥r♦st sttsts s ♥tr♦ ② ♠♣ rtr trt ♥ ♠♣ t ♥t s ♦♥♥ ♥t♦♥s ♦r t ♥②ss ♦ ♣r♠tr ♥ ♥♦♥♣r♠tr ①♣t s♦rt s sss ♥rt♥ ♥ ❩♥ ♥ s ♦ ♥♥ ♥t♦♥s ♦r ♦♠♣t♥ st♥r rr♦rs ♦ rs ♥ ♣r♦♠♥st♠t♦rs t sr② ♦rrt rtr♥s s sss ♥ ♥ ♥ rt♥ r ♣r♦ t♥t♦♥ ♥ s ♣r♦♣rts ♦ ♥♥ ♥t♦♥s t t♦r tr s ♦r ♥rst♥♥ t♥♥ ♦ ♦trs ♦♥ rs ♥ ♣r♦r♠♥ st♠t♦rs ♥ ♦r ♦♠♣t♥ st♥r rr♦rs ♦ s st♠t♦rs♦r ♦t ♥♦rrt ♥ sr② ♦rrt rtr♥s

s ♥ Pr♦r♠♥ st♠t♦r ♥t♦♥ ♣rs♥tt♦♥s

rs♠♣ s s♠♣ s③ n t♥s t♦ ♥♥t② ♦ rs ♦r ♣r♦r♠♥ st♠t♦r ♠② r♣rs♥t s ♥t♦♥ T = T (F ) ♦ t ♠r♥ strt♦♥ ♥t♦♥ F ♦ t♠ srs r1, r2, . . . , rn♦ rtr♥s ♦r ①♠♣ t ♥t♦♥ ♦r t ♠♥ ①♣t s

tr♠ ♥t♦♥ rrs t♦ ♥t♦♥ ♦s ♦♠♥ s ♥ ♥♥t ♠♥s♦♥ s♣ t s♣ ♦ strt♦♥

♥t♦♥s

Page 2: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

µ(F ) =

rdF (r)

♥ t ♥t♦♥ ♦r t st♥r t♦♥ rtr♥s ♦tt② s

σ(F ) =

[∫

(r − µ(F ))2dF (r)

]1

2

.

♥ ♥t♦♥ r♣rs♥tt♦♥ T (F ) ♦ ♥ st♠t♦r ♥ts♠♣ ♥♦♥♣r♠tr st♠t♦r Tn s s②♦t♥ ② r♣♥ t ♥♥♦♥ strt♦♥ F ② t ♠♣r strt♦♥ Fn tt s ♠♣ ♦ t1/n t ♦ t ♦sr rtr♥s s r1, r2, . . . , rn

Tn = T (Fn) = T (r1, r2, . . . , rn).

♦r ①♠♣ t ♥ts♠♣ ♥♦♥♣r♠tr st♠t♦rs ♦ t ♠♥ ♥ st♥r t♦♥ r t s♠♣♠♥ ♥ s♠♣ st♥r t♦♥ rs♣t②

µn =1

n

n∑

t=1

rt σn =

[

1

n

n∑

t=1

(rt − µn)

]1

2

.

❲ ♥♦t tt ♦♥ ♥ s♦ r ♣r♠tr st♠t♦rs r♦♠ ♣r♠tr ♥t♦♥ r♣rs♥tt♦♥ ♦t♥② r♣♥ F ② Fθ r θ s t ♣r♠tr t♦r ♦r ♣r♠tr strt♦♥ ♥t♦♥ ♥ ts s♦♥ ♦t♥s t ♥ts♠♣ st♠t♦r ② r♣♥ t ♥♥♦♥ ♣r♠tr ② ts st♠t♦r t②♣②t ♠①♠♠♦♦ st♠t♦r ♦r ①♠♣ rt♥ ♥ ❩♥ ♦r trt♠♥t ♦♣r♠tr ♥ ♥♦♥♣r♠tr st♠t♦rs ♦r ♥♦r♠ ♥ tstrt♦♥s ♦r ts rst rs♦♥ ♦t P ♣ ♦♥② s t ♥♦♥♣r♠tr rs ♥ ♣r♦r♠♥ st♠t♦rs

st♠t♦r ♥♥ ♥t♦♥ ♥t♦♥

♥♥ ♥t♦♥s r s ♦♥ t s ♦ t ♦♦♥ ♠①tr strt♦♥ ♣rtrt♦♥ ♦ ① trtstrt♦♥ F (x)

Fγ(x) = (1− γ)F (x) + γδr(x), 0 ≤ γ < 1/2

r δr(x) s ♣♦♥t ♠ss srt strt♦♥ ♥t♦♥ t ♠♣ ♦ t ♦♥ ♦t t r ♥♥ ♥t♦♥ ♦ ♥ st♠t♦r t ♥t♦♥ ♦r♠ T (F ) s ♥ s

IF (r;T, F ) = limγ→0

T (Fγ)− T (F )

γ=

d

dγT (Fγ)|γ=0

♥♥ ♥t♦♥ s s♣ rt♦♥ rt t① rt ♦ t ♥t♦♥ T (F )♥ t rt♦♥ ♦ ♣♦♥t ♠ss strt♦♥s δr t t F

Page 3: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

t s strt♦rr ♥ ♠♦r ♦r ss t♦s t♦ r ♦r♠s ♦r t ♥♥ ♥t♦♥s ♦ rs ♥♣r♦r♠♥ st♠t♦rs ♦r ①♠♣ t ♥♥ ♥t♦♥ ♦ t s♠♣ ♠♥ s

IF (r;µ;F ) = r − µ

r µ = µ(F ) ♣♥s ♦♥ t ♥r②♥ rtr♥s ♠r♥ strt♦♥ F ♦ ♥♥ ♥t♦♥s t ♣r♦♣rt② tt ts ①♣t s ③r♦ s rt♦♥ ♦ t ♥r ♣r♦♣rt② t♥ ♥ ♥♥♥t♦♥ s ③r♦ ①♣t

E [IF (r;T, F )] = 0.

② ♥♥ ♥t♦♥ Pr♦♣rt②

② ♥♥ ♥t♦♥ ♣r♦♣rt② s tt ♦r st♠t♦r ♥t♦♥s t ♥ts♠♣ st♠t♦rTn = T (Fn) = T (r1, r2, . . . , rn) ♥ ①♣rss s t ♦♦♥ ♥r ♦♠♥t♦♥ ♦ ♥♥♥t♦♥tr♥s♦r♠ rtr♥s

Tn − T (F ) =1

n

n∑

t=1

IF (rt;T, F ) + remainder

r t IF (rt;T, F ) r ♥♥♥t♦♥ tr♥s♦r♠ rtr♥s ♥ t r♠♥r ♦s t♦ ③r♦ ♥ ♣r♦st s♥s s n→ ∞ s t ♥t s♠♣ r♥ ♦ Tn s ♣♣r♦①♠t② ♥ ②

V ar (Tn) = V ar

[

1

n

n∑

t=1

IF (rt;T, F )

]

♥ ♥ t s♣ s r t rtr♥s rt r t tr♥s♦r♠ rtr♥s r ♥ t r♥♦ Tn rs t♦

V ar (Tn) =1

nE[IF 2(r1;T, F )].

♥ t ①♣tt♦♥ ♦♥ t rt♥ s ♥ t ♠♣r② s t s♠♣ ♠♥ ♦ t IF (rt;T, F ), t =1, 2, · · · , n♦r ♥ t rt, t = 1, 2, . . . , n r sr② ♦rrt t tr♥s♦r♠ rtr♥s t♠ srs IF (rt;T, F ) ♥r② sr ♦rrt♦♥ tt ♥s t♦ ♦♥t ♦r ♥ t♥ t r♥ ♦♥ t trt♥s ♦ ♣tr ♥②ss t♦r② ①t♥s② s ♥ s♥ ♥ ♥♥r♥ s♦s ttt r♥ ♦ t s♠ ♦ t s ♦ sr② ♦rrt stt♦♥r② t♠ srs s ♥ ② t s♣tr♥st② ♦ t t♠ srs t ③r♦ rq♥② s t ♣r♦♠ ♦ st♠t♥ t r♥ t ♣♦ss②sr② ♦rrt rtr♥s rs t♦ t ♣r♦♠ ♦ st♠t♥ t s♣tr ♥st② t ③r♦ rq♥② t ③r♦rq♥② ♦ t t t♠ srs IF (rt;T, F )/n ♥ ♥ rt♥ ❬❪ s♦ ♦ t♦ ♦ ts ② ♣♦②♥♦♠♥r③ ♥r ♠♦ tt♥ ♠t♦ t st ♥t rr③t♦♥ tt ♦rs ♥t rtr♥s r sr② ♦rrt s s ♥ t② r ♥♦rrt r ♠t♦♦♦② rrt♦ s t ♠t♦ s ♠♣♠♥t ♥ t st♠t♦r t♥r rr♦r ♣ ♥ tr♥ ♠s♥♠♥t s ♦ t P ♣ r sss♥ r

Page 4: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

P P st♠t♦rs ♥ tr ♥♥ ♥t♦♥s

sts t s②♠♦ ♦r r♦♥②♠♥ ♥♠s ♥ sr♣t♦♥s ♦ t rs ♥ ♣r♦r♠♥ st♠t♦rs ♦r t P ♣ ♦♠♣ts ♥♥ ♥t♦♥s st♠t♦r s ♥t♦♥ r♣rs♥tt♦♥ s♠♣ s st♠t♦r s ♥t♦♥ ♦ t♠ srs ♦ sst rtr♥s ♥ ♥ ♥♥ ♥t♦♥ ♦r♠ ❲strt ts ♦ ♦r t s ♦ t st♥r t♦♥ ♥ r♣ rt♦ st♠t♦rs

♠ st♠t♦r sr♣t♦♥

µ ♥

σ t♥r t♦♥

SSD ♠st♥r t♦♥

LPM ♦r ♣rt ♠♦♠♥t ♦ ♦rr ♦r t trs♦ c

ES ①♣t s♦rt t t ♣r♦t② α

VaR ❱trs t t ♣r♦t② α

SR r♣ rt♦

SoR ♦rt♥♦ rt♦ t trs♦ t ♠♥ ♦r ♦♥st♥t c

ESratio ♥ ①ss rtr♥ t♦ rt♦ t t ♣r♦t② α

VaRratio ♥ ①ss rtr♥ t♦ ❱ rt♦ t t ♣r♦t② α

Omega ♠ rt♦ t trs♦ c

RachR rt♦ t ♦r ♣♣r t ♣r♦ts α ♥ β

st♠t♦r ♠s ♥ sr♣t♦♥s

t♥r t♦♥

♥t♦♥ r♣rs♥tt♦♥ σ(F ) ♦ t s♠♣ st♥r t♦♥ st♠t♦r s ♥ ② ♥ t♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ t s♠♣ st♥r t♦♥ st♠t♦r s

IF (r;σ;F ) = (2σ)−1((r − µ)2 − σ2)

r µ = µ(F ) ♥ σ = σ(F ) s♠♣ st♥r t♦♥ st♠t♦r s ♥ ♥

r♣ t♦

♦r♠ ♦r t ♥t♦♥ r♣rs♥tt♦♥ ♦ t r♣ rt♦ s

SR(F ) =µ(F )− rfσ(F )

=µe(F )

σ(F )

Page 5: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r µe(F ) s t ♠♥ ①ss rtr♥ ♦r t rsr rt rf ♥ t ♥♥ ♥t♦♥ ♦r♠ s

IF (r;SR;F ) = − µe

2σ3(r − µ)2 +

1

σ(r − µ) +

µe

2σ.

s♠♣ st♠t♦r ♦ t r♣ rt♦ s

SRn =µn − rfσn

r µn ♥ σn r t s♠♣ ♠♥ ♥ s♠♣ st♥r t♦♥

♥t♦♥ ♦r♠s ♥ rt♦♥s ♦ t ♥♥ ♥t♦♥ ♦r♠s ♦r t st♠t♦rs ♥ ♠② ♦♥ ♥ ❩♥ t ❬❪ ♦r t ♦♥♥♥ ♦ ♥trst rrs t ♥♥ ♥t♦♥s ♦ tst♠t♦rs ♥ r ♣r♦ ♥ ♣♣♥①

s♥ Pr♠trs

❲ ♥♦t tt t ♥♥ ♥t♦♥ ♦r♠s ♦ s s ♥ ♣♣♥① ♦♥t♥ ♦♥ ♦r ♠♦r ♥s♥

♣r♠trs tt ♥ t♦ s♣ ♥ ♦rr t♦ ♦♠♣t ♥♥ ♥t♦♥ s ♦r r♦s s ♦ rtr♥ r ♦r ①♠♣ t ♦ t s♠♣ st♥r t♦♥ ♣♥s ♦♥ t t♦ ♥s♥ ♣r♠trsµ = µ(F ) ♥ σ = σ(F ) ♥ t r♣ rt♦ ♣♥s ♦♥ t tr ♥s♥ ♣r♠trs µ = µ(F )σ = σ(F ) ♥ SR = SR(F ) tr ♦♠♥ ♦ ♦♥t♥s t ♥s♥ ♣r♠trs ♦r rs♥ ♣r♦r♠♥ st♠t♦r ♦♥ t t sr s♣ ♣r♠trs s s t ♣r♦ts ♦rt♥♦ rt♦trs♦ t ♦rt ♦♠♥ ♦ ♦♥t♥s t s ♦ t ♥s♥ ♣r♠trs ♦r t s ♦♠♦♥t② rtr♥s strt♦♥ t ♠♥ µ = 0.01 ♦tt② σ = 0.05 ♥ rsr rt rf = 0 ♦r♠s♦r t ♥s♥ ♣r♠trs ♥ ♦ t♦ t tr s r ♦♥t♥ ♥ ♣♣♥①

❯s♥ t P P t♦ t ♥♥ ♥t♦♥s ♥

♦♠♣t ♥♥♥t♦♥ r♥s♦r♠ tr♥s

♦ ♥ ♥st ♥ ♦ t P ♣ t t ♦

rr②t♦♦s

♥st❴t♥t♦♥②rstsP

P ♣ ♦♠♣ts t ♥♥ ♥t♦♥s t♠ srs ♦ t rtr♥s ♦r t rs ♥ ♣r♦r♠♥♠srs ♥ P ♥ tr♥ s s ♥ Pr♦r♠♥♥②ts t sr ss t♦ rtr♥ t st♥rrr♦rs ♦r t rs ♥ ♣r♦r♠♥ ♠srs P ♣ s tr♦r rqr ② t P ♣

♦ ♠♦♥strt t s ♦ t P ♣ ♠ s ♦ t t st r♦♠ t ♣♣r♦s② ♠♥t♦♥ Pr♦r♠♥♥②ts s t st ♦♥t♥s ♥ rtr♥s r♦♠ ♥r② t♦ st ❨♦ ♥ ♦ tt t st ♥ ♦♥r♠ tt t s ♥ ①ts t♠ srs ♦t t t♦♦♥ ♦

Page 6: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

rr②P

t ♣ Pr♦r♠♥♥②ts

ss

❬❪ ①ts ③♦♦

❯s ♦ t ♦ ♥

♦♥♠s ♣ Pr♦r♠♥♥②ts

r t♦ ②♦ tt t ♥ st② ♥♠s r t♦♦ ♦♥ t♦ s♣② ♥ ♣♦ts ♦ s t ♦♦♥♦ t♦ r♣ t♦s ♦♥ ♥♠s t s♦rtr ♥♠s s ♦♦s ♥ t rst s① s ♦ t ♥

♦♥♠s

❱ ♦

♦♥♠s

❬❪

❬❪ ❱ ♦

❬❪

❬❪

♦ s t ♥t♦♥s r ♦♥t♥ ♥ t P ♣ s t ♦ ♥

rr②P

s♣P

st ♦ ♥t♦♥s ②♦ s s rst ♦ t ♦ ♦ ♥ t ♥t♦♥s s♦♥ ♥ t s♦♥♦♠♥ ♦ ❲ s t tr♠ ①①①① s ♥r ♦r ♥② ♦♥ ♦ t ♥t♦♥s ♥ t s♦♥ ♦♠♥ tr ♦♠♥ sts t ♥♠s ♦ ♥s♥ ♣r♠trs tt ♥ t♦ s♣ ♦♥ ② ♦r ♥♦tr t♦ ♦♠♣tt s ♦ ♥ ♥♥ ♥t♦♥ t r♦s s ♦ t ♥♥ ♥t♦♥ r♠♥t ♦rt ♦♠♥♦♥t♥s ♥♦r♠ strt♦♥ t②♣ s ♦r t ♥s♥ ♣r♠trs

❨♦ ♥ t ♣ ♦♥ ♥② ♦ t ♥t♦♥s ①①①① t ♦♠♠♦♥ t ♦♦♥

♣ ♦r t ♥t♦♥

Page 7: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

st♠t♦r ♥t♦♥ s♥ Pr♠trs ♦r♠ st s♥ Prs

µ ♠♥ µ

σ µ, σ

SSD ♠ µ, SSD, SMEAN

LPM1 P LPM 1c

LPM2 P LPM2c

ES qα, ESα

VaR ❱ qα, f(qα)

SR µe, σ, SR

SoRc ♦ µ, LPM2c, SoRc

SoRµ ♦ µ, SSD, SMEAN, SoRµ

ESratio rt♦ µ, qα, ESα, ESratio

VaRratio ❱rt♦ µ, qα, f(qα), V aRratio

RachR qα, ESα, q1−β , EGβ , RachR

Omega ♠ LPM 1c, UPM1c, Ω

♦ ♥t♦♥s ♥ ♦rrs♣♦♥♥ s♥ Pr♠trs

①①①① ♥t♦♥s r s ♦r t♦ st♥t ♣r♣♦ss rst s t♦ t ♥ st♠t♦r ♥♥♥t♦♥ t st ♦ r♠♥t s ♥ ♣♦t t♠ t♦ s♣② t s♣ ♦ t ♥♥ ♥t♦♥ s♦s t sr t♦ ①♣♦♦r t r♥t s♣s ♦ t ♥♥ ♥t♦♥s ♦ r♥t st♠t♦rs s♦♥♥ ♣r♠r② ♣r♣♦s ♦ t ♥t♦♥s s t♦ ♦♠♣t ♥♥♥t♦♥ tr♥s♦r♠ t♠ srs ♦ rtr♥s s rst st♣ ♥ t ♦r ♠t♦ ♦ ♦♠♣t♥ st♥r rr♦rs ♦r rs ♥ ♣rr♦♠♥ st♠t♦rs

r♠♥ts ♦ t ♥t♦♥s ♥ r t s♠ ①♣t ♦r t ♥s♥ ♣r♠trs r st♠t♦r s♣ ♦r ①♠♣ t r♠♥ts ♦ ♥ r s ♦♦s

rs

♥t♦♥ rtr♥s ❯ ♣ rt❱s ❯

♥sPrs ❯ ♣♦t ♣r♥t ❯ ♣rt♥

r♣rt♥♦rr ♥trs ♥t♦ ♦♦

♦t❬❪ ♣r♦st

rs

♥t♦♥ rtr♥s ❯ ♣ rt❱s ❯

♥sPrs ❯ ♣♦t ♣r♥t ❯ r

Page 8: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

♣rt♥ r♣rt♥♦rr ♥trs

♥t♦ ♦♦ ♦t❬❪ ♣r♦st

❨♦ s tt t r♠♥ts ♦ t t♦ ♥t♦♥s r t s♠ ①♣t ♦r t ♥s♥ ♣r♠trs r♠♥ts♣rs ♥ ♣rs

♦t tt ②♦ t ♥♦ rsts s♥ ♥ ①①①① ♥t♦♥ t ♥♦ r♠♥ts ♦r ①♠♣ tr② ♠♥ ♥s t ②♦ t ❨♦ ♥ t♦ tr st ♣ ♦r s♣♣② rtr♥s ①ts ♦t ♦r t r♠♥trtr♥s ♥ ♦rr ♦r ♥ ①①①① ♥t♦♥ t♦ ♦♠♣t rsts

t♥ ♥ P♦tt♥ ♥♥ ♥t♦♥s ♦r ♣ ♦♠♣rs♦♥s

♥ ♦rr t♦ ♦♠♣t t s ♥ ♣♦t t s♣s ♦ ♥♥ ♥t♦♥s s♥ t ①①①① ♥t♦♥s ♥ t s ♦ t ♥s♥ ♣r♠trs ♥ t tr ♦♠♥ ♦ ♥ t♦ s♣ ♥ tr rt♦ s ♠t♦s ♦ ♦♥ s♦ rst ♠t♦ s t♦ s t②♣ s ♦r t♦s ♣r♠trs ♥ t s♦ s♣ rtr♥s strt♦♥ rs r ♣r♦ ♦r t s ♦ ♥♦r♠ rtr♥s strt♦♥ ♥t ♦rt ♦♠♥ ♦ t ts ♦♥r♥♥ ♦ ts s r ♦t♥ r ♣r♦ ♥ ③♥t s♦♥ ♠t♦ s t♦ ♣r♦ t♠ srs ♦ rtr♥s ♦ ♥ sst ♦ ♥trst s ♦♥ ♦ t♥t♦♥s r♠♥ts ♥ ♥ tt s t ♥t♦♥ st♠t t s ♦ t ♥s♥ ♣r♠trsr♦♠ t t♠ srs ♦ rtr♥s

t♥ ♥ P♦tt♥ ♥♥ ♥t♦♥s ❯s♥ t s♥ Pr♠tr ❱s

❯s♥ t r♠♥t ♣ ♥ ♣♦t s ♦♦s ②♦ ♥ s② t ♥♥ ♥t♦♥ ♣♦ts♦r ①♠♣ ②♦ t ♣♦ts ♦ t ♥♥ ♥t♦♥s ♦ t st♥r t♦♥ ♥ r♣ rt♦ st♠t♦rss♥ t ♦♦♥ ♦

♣r♠r♦ ♣t② s

♦t ♣ ♣♦t ♣r♥t

♦t ♣ ♣♦t ♣r♥t

♣r♠r♦

♣♦ts r s♦♥ ♥ r

Page 9: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r ♥♥ ♥t♦♥s ♦ t♥r t♦♥ ♥ r♣ t♦ t②♣ ♥s♥ ♣r♠trs s

t♥ ♥ P♦tt♥ ♥♥ ♥t♦♥s t ❯sr♣ s♥ Pr♠tr ❱s

❯s♥ t ♥sPrs♥ ♥t♦♥ ②♦ ♥ ♥rt ♥s♥ ♣r♠trs ② s♣②♥ t②♣ s s ♦♥s♦♠ ss♠ rtr♥s strt♦♥ ♦r t rs ♠sr st♠t♦rs ♥ ♣r♦r♠♥ ♠sr st♠t♦rs t♥sPrs♥ ♥t♦♥ ss♠s ♦♦ t ♥♦r♠ strt♦♥ t ♠♦♥t② ♠♥ rtr♥ ♦ ♥ rsrrt rf = 0 ♥ ♠♦♥t② ♦tt② ♦ t ♦rrs♣♦♥♥ ♥♥ ♠♥ ♥ ♦tt② r ♥ rs♣t② ❲ s♦ ♥♦t tt s α = 0.10 ♦r q♥ts ❱ ♥ s tt ♦♥ t t β = 0.10 ♦r t rt♦ ♥ s c = 0 ♦r ♦r ♣rt ♠♦♠♥ts ♥ ♦rt♥♦ rt♦ t ①trs♦

♦ s t t s r♦♠ t ♥sPrs♥ ♥t♦♥ ②♦ ♥ ♦♦ t t r♠♥ts ♦ t ♥t♦♥ t r♠♥ts r t ♦♥s s t♦ ♥rt t s ♥

rs♥sPrs♥

♥t♦♥ ♠ s ♣ t

♦ ♥rt ♥s♥ ♣r♠trs s♥ r♥t t stt♥s ♦r ♥② ♦ t r♠♥ts ②♦ ♥ s♣②t ♥ s ♥ t r♠♥ts ♦ t ♥t♦♥ ♦r ①♠♣ ②♦ ♥t t♦ ♥rt ♥s♥ ♣r♠trs② s♥ ♠♥ rtr♥ ♦ ♥st ♦ ♥ ♦tt② ♦ ♥st ♦ t ts t♦ ♥rtt ♥♥ ♥t♦♥s ♣♦ts ♦r t st♥r t♦♥ ♥ t r♣ rt♦ ②♦ ♥ s t ♥sPrs

r♠♥t s ♥ t ♦♦♥ ♦

Page 10: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

♣r♠r♦ ♣t② s

♦t ♣ ♣♦t ♣r♥t ♥sPrs♥sPrs♥♠ s

♦t ♣ ♣♦t ♣r♥t ♥sPrs♥sPrs♥♠ s

♣r♠r♦

r ♥♥ ♥t♦♥s ♦ t♥r t♦♥ ♥ r♣ t♦ srs♣ ♥s♥ ♣r♠trs

t♥ ♥ P♦tt♥ ♥♥ ♥t♦♥s ❯s♥ s♥ Pr♠tr ❱s st♠t r♦♠

tr♥s ♠ rs

❨♦ ♥ s♦ ♦♠♣t ♥♥ ♥t♦♥ s♣s s♥ ♥s♥ ♣r♠tr s tt r st♠t r♦♠ rtr♠s t♠ srs ♦ ♥trst t ttr ♦ s s♣ ② s♥ t r♠♥t rtr♥s ♦ t①①①① ♥t♦♥s ♦r ①♠♣ ②♦ ♦ s t ♥ t♠ srs ♦r ts ♣r♣♦s ② s♥ t♦♦♥ ♦ t rsts ♦ r s♦♥ ♥ r ♦t tt ♥ s♥ t ♥ ♥t♦♥st ♣ s rt♥

rr②①ts st ♥st ①ts ♣

rt

♣r♠r♦ ♣t② s

♦t rtr♥s rt ♣ ♣♦t ♣r♥t

♦t rtr♥s rt ♣ ♣♦t ♣r♥t

♣r♠r♦

Page 11: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r ♥♥ ♥t♦♥s ♦ t♥r t♦♥ ♥ r♣ t♦ st♠t ♥s♥ ♣r♠trs s

t♥ ♥ P♦tt♥ ♥♥♥t♦♥ r♥s♦r♠ tr♥s ♠ rs

♥r ♠t♦ ♦ st♠t♥ st♥r rr♦rs ♦ rs ♥ ♣r♦r♠♥ st♠t♦rs sr ♥ ♥♥ rt♥ ♦♥ssts ♦ ♦♠♣t♥ ♦♦ st♠t ♦ t r♥ ♦ t♠ srs s♠♣ r ♦♥♥♥t♦♥ tr♥s♦r♠ rtr♥s s♦♥ ♦♥ t rt♥s ♦ ♥ s ②♦ r ♥trst ♥s♥ t ♥♥♥t♦♥ tr♥s♦r♠ rtr♥s ♦♦ ♦r t rtr♥s t ♥ s② ♦♠♣t srtr♥s t t ①①①① ♥t♦♥ ♦r ①♠♣②♦ ♥ ♦ s♦ ♦r ♥ st♠t♦rs ♦r t ♥ rtr♥s t t ♦♦♥ ♦ ♦s rsts ♦r t rtr♥s ♥ ♦r t ♥ st♠t♦r♥♥ ♥t♦♥ tr♥s♦r♠ rtr♥s r s♦♥ ♥ r

rt

♦t rtr♥s rt ♣♦t ♣r♥t

♦t rtr♥s rt ♣♦t ♣r♥t

♣r♠r♦

♣♦trt ② tr♥s ♠♥ ♥ tr♥s

♣♦t♦t ♠♥ r♥s♦r♠ tr♥s

♣♦t♦t ♠♥ r♥s♦r♠ tr♥s

Page 12: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r t♥r t♦♥ ♥ r♣ t♦ ♥♥♥t♦♥ r♥s♦r♠ tr♥s ♦r ♥

tr ♥♥

r② r ♦tr ♥♥ ♠t♦ tt sr♥s ♦trs ♥ ♦t♥ s ♦♥ r♦st ♦t♦♥st♠t♦r ♥ ♥ ss♦t r♦st s st♠t♦r s ♦t♦♥ st♠t♦r s ♦♠♣t s s♦t♦♥♦ t qt♦♥

n∑

t=1

ψ

(

rt − µM

s

)

= 0

r ψ = ψ(x) s st ♦ ♣s ♥t♦♥ ♥ s s r♦st s st♠t ♦ t rss ǫt = rt− µM ♦r ♥ ♥tr♦t♦♥ t♦ ♦t♦♥ st♠t♦rs ♥ tr ♦♠♣tt♦♥ s t♦♥s ♥ ♦ r♦♥♥ t

r s t s♣ ♦♣t♠ ♣s ♥t♦♥

ψopt(x) = SGN(x)

(

|x|+ a

φ(x)

)+

,with a = 0.002449

Page 13: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r φ(x) s t st♥r ♥♦r♠ ♥st② ♥t♦♥ ♥ ♣♦t ♦ ts ♣s ♥t♦♥ s s♣② ♥ r ♥t♦♥ ψopt(x) s s♠♦♦t rt♦♥ rtr ♥ tt t ♥t♦♥ s ♦♥t♥♦s ♥ rtr♥st s rs (rt−µM )/s rr ♥ ♠♥t t♥ r rt ♥ t s♥s tt s rtr♥s ♥♦ ♥♥ ♦♥ t st♠t µM s♥ s tr♠s r st t♦ ③r♦ ♥ ♦r rtr ts ♦♥ t♥t♦♥ ψopt(x) s t♦♥ ♦ r♦♥♥ t

r ♣t♠ s ♦st Ps ♥t♦♥ t ψopt(x) = 0 ♦r |x| > 3.568 ♥ ♦r♠ strt♦♥♥②

s ♦♥ ♦t♦♥ st♠t µM ♥ ss♦t s st♠t s t s ♥tr t♦ ♥ rtr♥s ♦trs st♦s rtr♥s rt tt ♦ts t ♥tr [µM − 3.568 · s, µM + 3.568 · s] ♦trs r t♥ ♥② sr♥♥ t♠ t♦ t ♥rst ♦♥r② ♦ tt ♥tr

♦r t ① ♥♦♠ rtr ♥ rtr♥s t tr♥s ♦t tt µM = .00640 ♥ s = .00547s [−.0131, .0259] ♦rrs♣♦♥♥② rtr♥s t s ss t♥ ♦r rtr t♥ rtt s ♦trs ♥ sr♥ ♦r♥② ♦♦♥ ♦ rsts ♥ r s♦s t s♠♣♠♥ tr♥s♦r♠ rtr♥s r q t♦ rtr♥s ♠♥s t r② s♠ ♠♥ ♦ t rtr♥s ♥ t t♦♣ ♣♦t ♥ t ♦tr ♥ tr♥♦r♠ rtr♥s ♥ t ♦tt♦♠ ♣♦t

rt

tr ♠♥rtr♥s rt♣r♥t

tr♥ ♠♥rtr♥s rt ♥trs ♣r♥t

♣r♠r♦

♣♦ttr♠♥ tr♥s

♣♦ttr♥♠♥ tr ♥ tr♥s

♣r♠r♦

Page 14: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r tr♥s ♥ tr ♥ tr♥s

st s t♦ ♦♠♣r t rtr♥s ♥ ♦tr ♥ rtr♥s s♦ ♥ r t ♦r♠r♣♦t t s♦ ♥ ♥ t ttr s ♦r ♦ts

♣♦ttr ♠♥

tr♥s ♥ ♥ tr ♥ tr♥s ♦ts

♣♦♥tstr♥♣

Page 15: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r r tr♥s ♥ ♥ tr ♥ tr♥s ♦ts

Prt♥♥

♣tr ♥st② ♥t♦♥ st♠t♦♥ s rq♥t② s ♠t♦ ♥ t ♦ s♥ ♣r♦ss♥ ♥ ♥ ♦tr♥♥r♥ ♥ s♥ ♣♣t♦♥s Prt♥♥ s t♥q ♦t♥ s t♦ ♠♣r♦ t ♣r♦r♠♥ ♦s♣tr ♥st② st♠t♦rs ♥ t ♦r ♦ t ♠t♦ sr ♥ ♥ ♥ rt♥ ❬❪ s st♠t♦♥ ♦ s♣tr ♥st② t rq♥② ③r♦ ♦ ♥ ♥♥♥t♦♥ tr♥s♦r♠ rtr♥s t♠ srs IFt t s ♥trt♦ t♦ s ♣rt♥♥ ♦ tt t♠ srs s♦rP❲ r♥t ♦ t s s♦r ♠t♦ ♥t st♠t♦rt♥rrr♦r ♣ ♠♣♠♥t s ♣rt♥♥

♣rt♥ rs♦♥ IF pwt ♦ t IFt t♠ srs s ♦♠♣t s

IF pwt = IFt − ρIFt−1

r ρ s ♦♥ sr ♦rrt♦♥ ♦♥t st♠t ♦ t IFt ♥ ♥r t IF pwt srs s ♥♦t sr②

♥♦rrt t ♥♦s srs t t s ♦♥sr② ss sr ♦rrt♦♥ t♥ IFt ♥ ♣r♦♦r♠st♠t♦r s ♦♥ IF pw

t sr r♦♠ rt② tt s ♦♠♣r t ♦♥ s ♦♥ IFt

♦♦♥ ♦ ♦♠♣ts ♥ ♣♦ts ♥ r t tr♥s♦r♠ rtr♥s ♥ t ♣rt♥ tr♥s♦r♠ rtr♥s

Page 16: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

tr rtr♥s rt♣r♥t

P❲tr rtr♥s rt♣rt♥ ♣r♥t

♣r♠r♦

♣♦ttr♠♥ r♥s♦r♠ tr♥s

♣♦tP❲tr♠♥ Prt♥ r♥s♦r♠ tr♥s

♣r♠r♦

r r♥s♦r♠ tr♥s t♦♣ ♥ Prt♥ ❱rs♦♥ ♦ t ♠ ♦tt♦♠

♦♦♥ ♦ ♦♠♣ts ♥ s♣②s t tr♦ t♦♦rrt♦♥s ♦ t t♠ srs ♥ r

♦rrtr tr ♠① ♣♦t

♦rrP❲tr P❲tr ♠① ♣♦t

♦t tr♠r♦♥r♥♦rrtr♦rrP❲tr

♥♠s♦t

r♦♥♠s♦t t♦♦rr rtt♦♦rr P❲ rt

♦t❬❪

Page 17: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

t♦♦rr rt

t♦♦rr P❲ rt

tr ♥♥ Pr♦r t♦ Prt♥♥

♥ ♦trs ♥ rs ♥♥ ♥♦t ♦♥② ♦♥ rs ♥ ♣r♦r♠♥ st♠t♦rs t s♦ ♦♥ tst♠t♦r ρ s ♦r ♣rt♥♥ t s ②s ♦♦ t♦ ♣♣② t ♦tr ♥♥ ♠♦ ♦ t♦♥ ♦r ♣rt♥♥ ❲ strt ♦♥ ts t t ♦♦♥ ♦ ♥ ♣♦ts ♥ t♦♦rrt♦♥t♦♥s

tr ♠♥rtr♥s rt♥trs ♣r♥t

P❲tr ♠♥rtr♥s rt♥trs ♣rt♥ ♣r♥t

♣r♠r♦

♣♦ttrt②♣ ♠♥ tr ♥ tr♥s

♣♦tP❲trt②♣ ♠♥ Prt♥ tr ♥ tr♥s

♣r♠r♦

r r♥s♦r♠ tr ♥ tr♥s t♦♣ ♥ Prt♥ ❱rs♦♥ ♦ t ♠♦tt♦♠

Page 18: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

♦♦♥ ♦ ♦♠♣ts ♥ s♣②s t tr♦ t♦♦rrt♦♥s ♦ t t♠ srs ♥ r

♦rrtr tr ♠① ♣♦t

♦rrP❲tr P❲tr ♠① ♣♦t

♦t tr♠r♦♥r♥♦rrtr♦rrP❲tr

♥♠s♦t

r♦♥♠s♦t t♦♦rr ♥ rtt♦♦rr P❲ ♥ rt

♦t❬❪

t♦♦rr ♥ rt

t♦♦rr P❲ ♥ rt

♣♣♥① st♠t♦r ♥t♦♥ ♦r♠s ♥ ♥♥ ♥t♦♥

♦r♠s

r ♣r♦ t ♥t♦♥ ♦r♠ ♦ t st♠t♦rs ♥ ♥ t ♦r♠s ♦r tr ♥♥♥t♦♥s ♥trst rr ♥ ♥ t rt♦♥s ♦ ts ♦r♠s ♥ ❩♥ t

♥t♦♥ r♣rs♥tt♦♥ µ(F ) ♦ t s♠♣ ♠♥ st♠t♦r s ♥ ② ♥ t ♦r♠ ♦r t♥♥ ♥t♦♥ ♦ t s♠♣ ♠♥ s

IF (r;µ;F ) = r − µ

r µ = µ(F )

t♥r t♦♥

♥t♦♥ ♦r♠ ♦ st♥r t♦♥ s

σ(F ) =

(∫

(x− µ(F ))2dF (x)

)1/2

.

♥ t ♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ t st♥r t♦♥ s

IF (r;σ;F ) =1

(

(r − µ)2 − σ2

)

Page 19: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

♠t♥r t♦♥ ♠

♥t♦♥ rs♣rs♥tt♦♥ SSD(F ) ♦ t s♠♣ s♠st♥r t♦♥ s

SSD(F ) =

(

∫ µ(F )

−∞

(x− µ(F ))2dF (x)

)1/2

♥ t ♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ t s♠♣ s♠st♥r t♦♥ s

IF (r;SSD;F ) =(r − µ)2 · I(r ≤ µ)− 2 · SMEAN · (r − µ)− SSD2

2 · SSD

r µ = µ(F ) SSD = SSD(F ) ♥ SMEAN s t s♠♠♥ SMEAN(F ) =∫ µ

−∞(x− µ)dF (x)

♦r Prt ♦♠♥t P

r r t♦ rs♦♥s ♦ P t ♦r ♣rt ♠♦♠♥t ♦ ♦rr ♦♥ LPM1c ♥ t ♦r♣rt ♠♦♠♥t ♦ ♦rr t♦ LPM2c ♦s ♥t♦♥ r♣rs♥tt♦♥ r s♣ ss ♦ t ♦rr n ♦r♣rt ♠♦♠♥t

LPMnc(F ) =

∫ c

−∞

(c− x)ndF (x)

r c s sr s♣ ♦♥st♥t trs♦ s trs♦ s ♦tr♥ rrr t♦ s t ♠♥♠♠ ♣t

rtr♥ MAR

♥♥ ♥t♦♥ ♦r♠s ♦ ts t♦ ♦r ♣rt ♠♦♠♥ts r

IF (r;LPM1c;F ) = (c− r)I(r ≤ c)− LPM1c

r LPM1c = LPM1c(F ) ♥

IF (r;LPM2c;F ) = (c− r)2I(r ≤ c)− LPM2c

r LPM2c = LPM c(F )

❱ts ❱

♥t♦♥ ♦r♠ ♦r trs s

V aRα(F ) = −qα(F ).

♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ ❱ s

IF (r;V aRα;F ) =1

f(qα)(I(r ≤ qα)− α)

Page 20: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

①♣t ♦rt

♥t♦♥ ♦r♠ ♦ ①♣t s♦rt s

ESα(F ) = − 1

α

∫ qα(F )

−∞

x · dF (x).

♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ t s

IF (r;ES;F ) = − I(r ≤ qα)

α· (r − qα)− qα − ESα

r♣ t♦

♥t♦♥ r♣rs♥tt♦♥ ♦ t r♣ rt♦ s

SR(F ) =µ(F )− rfσ(F )

=µe(F )

σ(F ).

♥ t ♥♥ ♥t♦♥ ♦r t r♣t♦ s

IF (r;SR;F ) = − µe

2σ3(r − µ)

2+

1

σ(r − µ) +

µe

r µe = µe(F ) =µ(F )− rf ♥ σ = σ(F )

♦rt♥♦ t♦ ♦

r r t♦ rs♦♥s ♦ t ♦rt♥♦ rt♦ rst rs♦♥ ♦ ♦ s t ♥t♦♥ r♣rs♥tt♦♥

SoRc(F ) =µ(F )− rf

LPM2c(F )=

µe(F )√

LPM2c(F )

r t ssr♣t c rts t s ♦ t ♦♥st♥t trs♦ ♥ t ♥♦♠♥t♦r ♦r ♣rt ♠♦♠♥t ♦♦rr t♦

s♦♥ rs♦♥ ♦ ♦ s t ♥t♦♥ ♦r♠

SoRµ(F ) =µ(F )− rfSSD(F )

=µe(F )

SSD(F )

r t ssr♣t µ ♥ts t s ♦ t ♠♥ ♥ t ♥♦♠♥t♦r s♠st♥r t♦♥

♥♥ ♥t♦♥ ♦r SoRc(F ) s

Page 21: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

IF (r;SoRc;F ) =−SoRc · I(r ≤ c)

2 · LPM2c(r − c)2 +

1√LPM2c

(r − µ) +SoRc

2

r µ = µ(F ),LPM2c = LPM2c(F ) SoRc = SoRc(F )

♥♥ ♥t♦♥ ♦r SoRµ(F ) s

IF (r;SoRµ;F ) = −SoRµ · I(r ≤ µ)

2 · SSD2(r − µ)2 +

(

SoRµ · SMEAN

SSD2+

1

SSD

)

(r − µ) +SoRµ

2

r µ = µ(F ),SSD = SSD(F ) SoRµ = SoRµ(F )

①♣t ♦rt t♦ rt♦

♥t♦♥ ♦r♠ s

ESratio(F ) =µ(F )− rfESα(F )

=µe(F )

ESα(F )

♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ t rt♦ s

IF (r;ESratio;F ) =r − µ

ESα− ESratio

ESα

(

− qα − ESα − I(r ≤ qα)

α· (r − qα)

)

❱ts t♦ ❱rt♦

♥t♦♥ ♦r♠ ♦ t ❱ rt♦ s

V aRratio(F ) =µ(F )− rfV aR(F )

=µe(F )

−qα(F )

♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ t ❱rt♦ s

IF (r;V aRratio;F ) = −r − µ

qα+V aRratio

qα× I(r ≤ qα)− α

f(qα).

Page 22: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

t♦

♥t♦♥ ♦r♠ s

RachR(F ) =EGβ

ESα=

1β ·∫ +∞

q1−βxdF (x)

− 1

α·∫ qα−∞

xdF (x)

r ESα = ESα(F ) s t ①♣t s♦rt t α ♥ EGβ = EGβ(F ) s t ①♣t t ♥ t♣♣r βq♥t ♥ ② t ♦♦♥ qt♦♥

EGβ =1

β·∫ +∞

q1−β

xdF (x)

♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ t rt♦ s

IF (r;RaR;F ) =1

ESα

(

I(r ≥ q1−β)

β(r − q1−β)+q1−β−EGβ

)

−RachRESα

·(−I(r ≤ qα)

α(r − qα)−qα−ESα

)

♠ t♦ ♠

♥t♦♥ s

Ω(F ) =UPM1c(F )

LPM1c(F )=

∫ +∞

c(x− c) f(x)dx

∫ c

−∞(c− x) f(x)dx

♦r♠ ♦r t ♥♥ ♥t♦♥ ♦ t ♠ rt♦ s

IF (r; Ω;F ) =1

LPM1c·(

(r − c) · I(r ≥ c)− UPM1c

)

− Ω

LPM1c·(

(c− r)·I(r ≤ c)− LPM1c

)

♣♣♥① s♥ Pr♠trs t♦♥ ♦r ♦r♠② s

trt tr♥s

♥ ♦rr t♦ ♦♠♣t t s ♦ ♥② ♦ t ♥♥ ♥t♦♥s ♣rs♥t ♥ t♦♥ s ♦ t ♥s♥♣r♠trs st ♥ t tr ♦♠♥ ♦ r ♥ ♥ ② ♦ ♦t♥♥ t ♥s♥ ♣r♠trss t♦ s♣② t♠ t t②♣ s s ♥ ss♠ rtr♥s strt♦♥ ♦r t rs ♠sr st♠t♦rs♥ ♣r♦r♠♥ ♠sr st♠t♦rs s ♦ s♦ r ♦r ♥ ss♠ rtr♥s ♥♦r♠ strt♦♥ t

Page 23: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

♠♦♥t② ♠♥ rtr♥ ♦ ♥ rsr rt rf = 0 ♥ ♠♦♥t② ♦tt② ♦ t ♦rrs♣♦♥♥ ♥♥♠♥ ♥ ♦tt② r ♥ rs♣t② ❲ s♦ ♥♦t tt s α = 0.10 ♦r q♥ts ❱♥ s tt α ♦♥ t t β = 0.10 ♦r t rt♦ ♥ s c = 0 ♦r ♦r ♣rt♠♦♠♥ts ♥ ♦rt♥♦ rt♦ t ① trs♦ ♦ s♣② t t♦♥ ♦ t ♦rrs♣♦♥♥ ss♦♥ ♥ t tr ♦♠♥ ♦

σ2 = 2 · σ2semisd = 2 · SemiSD2 ♥ s♦ SSD = σ/

√2 s SemiSD = 0.0353

♥ ∫ µ

−∞(r− µ)f(r)dr ♥ ♦r f(r|µ, σ) = 1√

2π· exp

(

(r − µ)2

2σ2

)

♥ −σ√2π

= −0.0199

P

❯♥r ♥♦r♠ strt♦♥ N(µ, σ2) LPM1c = LPM1c(µ, σ) s ♥t♦♥ ♦ µ ♥ σ s

LPM1c(µ, σ) =

∫ c

−∞

(c− x)f(x|µ, σ)dx

=

∫ d

−∞

(d− y)f(y|0, 1)dy · σ

= (d · Φ(d) + φ(d)) · σ

r d =c− µ

σ♥ Φ ♥ φ r t ♥ ♣ ♦ t st♥r ♥♦r♠ strt♦♥ ♥t♦♥

♦r t ♥ s ♦ µ σ ♥ c = 0

LPM1c = .0153

P

♦r t ♥♦r♠ strt♦♥ N(µ, σ2) LPM2c = LPM2c(µ, σ) s ♥t♦♥ ♦ µ ♥ σ s

LPM2c(µ, σ) =

∫ c

−∞

(c− x)2f(x|µ, σ)dx

=

∫ d

−∞

(d− y)2f(y|0, 1)dy · σ2

=((

d2 + 1)

· Φ(d) + d · φ(d))

· σ2

r d =c− µ

σ♥ Φ ♥ φ r t ♥ ♣ ♦ t st♥r ♥♦r♠ strt♦♥ ♥t♦♥ ♦r t

♥ ♦ µ = 1% σ = 5% ♥ c = 0

LPM2c = .000898.

Page 24: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

①♣t ♦rt

♦r♠ ♦r ①♣t s♦rt ♦r ♥♦r♠ strt♦♥ s

ESα = −µ+ σ · φ(zα)α

r φ s t st♥r ♥♦r♠ ♥st② ♥t♦♥ ♥ zα s t ♦r αq♥t ♦ t st♥r ♥♦r♠strt♦♥ ♦r t s♣ ♣r♠trs ESα = .0777

♣ ♥t

♦r t s♣ ♥♦r♠ strt♦♥ ts q♥t s qα = q.10 = −0.0541

♦r ❱ t ♥s♥ ♣r♠tr f(qα) s t ♥♦r♠ ♥st② fnormal(r;µ, σ2) t t r = qα ♥ ♦r

t s♣ ♣r♠trs fnormal(qα;µ, σ2) =

r♣ t♦

♦r t s♣ ♥♦r♠ strt♦♥ t µ = µe = 1% ♥ σ = 5% t r♣ rt♦ s SR = 0.2.

♦rt♥♦ t♦ ♦ t ♥ rs♦

♦r t s♣ ♥♦r♠ strt♦♥ t µ = µe = 1% ♥ σ = 5% SemiSD = σ/√2 = .0354

SMEAN = −φ(0) · σ = −.0199 ♥ SoRµ =µe

SemiSD= .2828.

♦rt♥♦ t♦ ♦ t ♦♥st♥t rs♦

♦r t s♣ ♥♦r♠ strt♦♥ t µ = µe = 1% ♥ σ = 5% d =c− µ

σ= −.2. r♦r LPM2c =

((

d2 + 1)

· Φ(d) + d · φ(d))

· σ2 = .000898

♦rt♥♦ rt♦ t ♦♥st♥t trs♦ s SoRc =µe√

LPM2c= .3337.

①♣t ♦rt t♦ rt♦

♦r t s♣ ♥♦r♠ strt♦♥ t µ = µe = 1% ♥ σ = 5% qα = q.10 = −.0541. ①♣t s♦rt s ESα = −µ+ σ · φ(zα)

α= .0777 ♥ rt♦ s ESratio =

µe

ESα= .129.

Page 25: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

❱ t♦ ❱rt♦

♦r t s♣ ♥♦r♠ strt♦♥ t µ = µe = 1% ♥ σ = 5% qα = q.10 = −.0541. ❱rt♦ s V aRratio =

µe

−qα= .185.

t♦

♦r t ♥♦r♠ strt♦♥ N(µ, σ2) t ♣♣r βq♥t s q1−β = µ+z1−β ·σ = .01+1.2816× .05 = .0741.

①♣t t ♥ t ♣♣r βq♥t s

EGβ =1

β·∫ +∞

q1−β

xf(x|µ, σ)dF (x)

=1

β·∫ +∞

z1−β

(µ+ σy)f(y|0, 1)dy

β·∫ +∞

z1−β

f(y|0, 1)dy + σ

β·∫ +∞

z1−β

y · f(y|0, 1)dy

= µ+σ

β·∫ +∞

z1−β

y · 1√2π

· exp(−y2

2

)

dy

= µ+σ

β· 1√

2π· exp

(− (z1−β)2

2

)

= µ+σ

β· φ (z1−β)

❲t t s♣ ♣r♠trs EGβ = .0977.

rt♦ s RachR =EGβ

ESα=.0977

.0777= 1.257.

♠ t♦ ♠

♦r t ♥ ♣r♠trs t P s LPM1c(µ, σ) = (d · Φ(d) + φ(d)) · σ = .0153.

♣♣r ♣rt ♠♦♠♥t s

UPM1c(µ, σ) =

∫ +∞

c

(x− c) f(x|µ, σ)dx

=

∫ +∞

−∞

(x− c) f(x|µ, σ)dx−∫ c

−∞

(x− c) f(x|µ, σ)dx

= µ− c+

∫ c

−∞

(c− x)f(x|µ, σ)dx

= µ− c+ LPM1c(µ, σ)

Page 26: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r♦r UPM1c(µ, σ) = .01− 0 + .0153 = .0253 ♥ t ♠ rt♦ s Ω =.0153

.0253= 1.652.

♦ ♦r ♦ t♦♥s

♦♦♥ ♦ s ♥ ss♥ s ♥ t P ♣ ♥t♦♥ ♥sPrs♥

s♥ ♣r♠tr ♦r rs st♠t♦rs

s

♠ssqrt

❬❪

♥♦r♠s

❬❪

P

♠s

P♣♥♦r♠♥♦r♠s

P

❬❪

P

♠s

P❫♣♥♦r♠♥♦r♠s❫

P

❬❪

q❴♣♠q♥♦r♠♣s

q❴♣

Page 27: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

❬❪

♠♥♦r♠q♥♦r♠♣♣s

❬❪

q❴♣♠q♥♦r♠♣s

q❴♣

❬❪

❴q❴♣♥♦r♠q❴♣♠s

❴q❴♣

❬❪

s♥ ♣r♠trs ♦r ♣r♦r♠♥ st♠t♦rs

s

t

♠s

❬❪

♦❴

♠s

P❫♣♥♦r♠♥♦r♠s❫

P

❬❪

♦♠sqrtP

❬❪

Page 28: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

♦❴♠

♠ssqrt

❬❪

♥♦r♠s

❬❪

♦♠♠♠

♦♠

❬❪

rt♦

q❴♣♠q♥♦r♠♣s

q❴♣

❬❪

♠♥♦r♠q♥♦r♠♣♣s

❬❪

rt♦♠

rt♦

❬❪

❱rt♦

q❴♣♠q♥♦r♠♣s

q❴♣

❬❪

❱rt♦♠q❴♣

❱rt♦

❬❪

Page 29: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

❴q❴♣♥♦r♠q❴♣♠s

❴q❴♣

❬❪

q❴♣♠q♥♦r♠♣s

q❴♣

❬❪

♠♥♦r♠q♥♦r♠♣♣s

❬❪

q❴♦♥❴♠♥s❴t♠q♥♦r♠ts

q❴♦♥❴♠♥s❴t

❬❪

♠♥♦r♠q♥♦r♠tts

❬❪

❬❪

♠s

P♣♥♦r♠♥♦r♠s

P

❬❪

❯PP♠

❯P

❬❪

♠❯PP

❬❪

Page 30: Vignette for Risk and Performance Estimators Influence Functions … · 2020-04-23 · Anthony Christidis, R. Douglas Martin, Shengyu Zhang April 22, 2020 Abstract The In uenceFunctions

r♥s

❳ ♥ ♥ rt♥ t♥r rr♦rs ♦ rs ♥ ♣r♦r♠♥ ♠sr st♠t♦rs ♦r sr② ♦rrtrtr♥s ❯ tt♣sssr♥♦♠strt

❩♥ rt♥ ♥ rsts ♥♥ ♥t♦♥s ♦r rs ♥ ♣r♦r♠♥ st♠t♦rs ❯ tt♣sssr♥♦♠strt


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