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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑+ b( i4 f4 `$ n- g; S
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& ~ P' I0 J m凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
' i( ?& i t1 I: S0 p% ]9 m. i K2 G
G3=S*S',G1=B*B',G0=F*F';(S:胜赔,B:平赔,F:负赔,S'欧平均胜率,B'欧平均平率,F'欧平均负率)
8 C2 c3 {) N6 t* {9 B) [什么?对于一家特定的公司,它的主胜的凯利指数G3=S*S'!你选择的公司样本不同,G值就不同,样本大小不同,G值也不同(一般的欧均值都取99家公司,从统计学的意义上来讲,还称不上样本!)这个G带有随意性,大个0.05小个0.08之类的,也只能算做误差,现在要我比较G与0.89哪个大?我大你个0.05怎么了?我小你个0.08又有什么干系? H% P+ \' B9 l U8 T. [
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& t" ]0 @) w! L( u* H% h
& I3 w g+ u& b6 T7 I( j既然涉及到平均胜率,那么看一下胜率是怎么求出来的:平均主胜率S'=(S1'+S2'+….Sn')/n,S1'是第一家公司的主胜率,S2'是第二家公司的主胜率,以此类推。主胜率S'=r/S(r:赔付率)。赔付率(返还率)又是这样求的:r=1/(1/S+1/B+1/F),什么??又做梦了!!返还率是庄家也要到裁判终场哨响才知道的,这样也行??AC米兰踢亚特兰大,哨响了,投注比固定了,但踢出3,这场返还率可能是150%,踢出1可能是20%,踢出0,可能是5%,结果不同,返还率也不同啊!这里也可以看到,博彩公司不喜欢操控比赛,因为他想操控的只能是这种强弱分明的比赛,但强队踢假球的成本更高,它想操控也操控不了,最好的选择就是烧烧香:天哪,爆个冷吧!
% b3 p6 `8 ^! [' W' H/ J4 V7 e6 Z/ _5 C5 S: K8 T8 s* D9 @$ m4 z L5 R
做下算术了: 2 i( y$ \ W: ~: {8 \" `
. j' }6 o6 E% P. w" _6 e' v3 }; ~' L. y! k5 F, M& W+ d
( \! m5 V6 C$ S+ D4 o1 l(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n% Q j" [. T B' p' I
+ |, r/ D' D3 h# E# X. L1 K) @2 k(2)立博: 2.10 3.25 3.00
/ W# _3 o, w. P& `3 S, n" i6 G( ~) r4 C; { h" t; q9 U
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
" w' v$ y$ L$ E# `9 o5 d
1 |- [' P. s# N, v7 l, i(4)易胜博:2.25 3.10 2.95 ) t4 Y9 ]! n8 w/ q! }2 f/ S1 i
- U+ {+ l. `) m% ~. _. E z3 O' H v4 ]6 D$ B' G* \
我们假设就取这四家公司为某场比赛开出的赔率来计算凯利值 4 ]( l/ W( O1 [+ y6 ?7 s
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S1=2.22 B1=3.15 F1=3.01
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S2=2.10 B2=3.25 F2=3.00 4 c& E$ p/ j! O" }3 L! ~. F& [
% ^# T/ X4 W2 j% ] s! R# J5 T* J) y7 T2 I2 U
S3=2.20 B3=3.10 F3=2.87 n/ ~# b+ ~& N3 \
9 A' e& q. H7 B1 c9 S5 j
! G& M, |8 O$ Q3 X5 y4 ~% HS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
* W. I2 [$ g! }6 V' d* U: O8 w( d5 ` _0 H- N/ h7 V4 v# F0 n. X3 T$ I4 g3 w
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 3 C* l6 {3 L/ F `9 o4 S; X0 N
3 ^. E, x K% p; A$ Z5 |; G
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l$ S1 N+ A1 w1 @$ }- G
$ F# w3 \6 @$ Q0 D/ g0 I& v1/r3=1/S3+1/B3+1/F3=1/2.20+1/3.10+1/2.87 => r3=0.89 % h8 r* k9 }8 X/ Q5 J' q
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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
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S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
: x1 q6 G) j2 V3 V ?( y% _( F E+ m
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j& a7 D& u8 k0 s8 F( M
# a. r, N( p* ~8 b! O' CS1'=41 B1'=29 F1'=30;
1 ~" {: L7 P! q$ {! P4 h+ n' c: P8 H& d$ W
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s6 Z' B# o, N( w0 w1 B
; m' V% T, u, P% O
/ w- _3 [6 v+ T( m% E5 M9 FS3'=40 B3'=29 F3'=31 + o) j3 G1 Z/ g6 [1 a
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
7 Z- r4 z0 q% G/ HS4'=40 B4'=29 F4'=31 . {6 l1 a0 S/ w
: B6 y" Y' M2 }4 T/ O0 g4 ~
+ I0 h( n, A9 t; B# h(注意:3,4两家公司,赔率不同,但它们的胜,平,负率相同了) 8 [+ b0 b& X# U( [. o$ V: J/ m- L& A) f
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
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* E# l, ?+ v1 J+ M/ TB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
9 s2 k+ F: H; z- j& t9 L& F8 f
3 z+ `) H7 R2 U" k" OF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 , y9 v c! V/ ]! d& {+ W; V R. h
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于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
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+ X* b; p& R! b; }* UG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
* t! C8 m7 l: t6 @4 _, H0 ]+ D$ n) P# X# M8 w) E Q! W! v1 C* t6 F3 @1 Q
G11=B1*B'=3.15*28.75=90.56 4 o: f& y4 q0 R$ w, U, _3 F
1 J1 `; o& K; F% M7 e/ O7 _; F, i* }G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
1 E3 b5 K& X# x" l$ Z- X- `
3 e8 \$ X( ~! O% J当然其它几家公司的凯利值也可以通过同样的方法求得,当然,事实上你不用去求(每场比赛这样求,不累死也气死了),赔率比较网站上都是这样算的。 好,到这里你应该可以知道了,凯利指数是怎么样被扭曲的了,因为除了赔率是真的,其它的都是做梦的时候梦到的(并非是攻击凯利指数,这个,前文和接下来的一比较就可以发现了)。 + J& N& @* n# J/ ]6 \
/ l% |, x% z6 X# R1 D6 D) U9 a6 C* |* h W0 f7 S7 s3 A2 @. G$ i
% N0 q: ~+ ^$ H/ ]通过对多家凯利指数的对比统计分析可以找出,数值变化与赛果之间的微妙关系,在足彩分析投注中能把握更多的冷门机会。 |
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数值变化与赛果之间的微妙关系,在足彩分析投注中能把握更多的冷门机会。 |
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