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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑# [4 \3 m2 v% z( O
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7 R$ _6 x4 N' m, ^6 D; q1 u凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
& F) ~) {6 F. N1 @9 |& G) K- f0 R; F& |' e( k% ^" S5 D& Z
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)
# L) y% k4 K! l( u5 T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. [
' {1 ]2 u! B( V9 u. i
5 L) \: g- U4 D8 G6 M2 X: z& t" ]0 @) w! L( u* H% h
4 E3 {& ?: q+ {0 j# J0 b" a% P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!
9 M. e( r. P4 N0 U7 e6 Z/ _5 C5 S: K8 T8 s
5 _8 a4 C& K! \$ I! _, q9 U做下算术了: 2 i( y$ \ W: ~: {8 \" `0 R$ Z6 `4 X- Z- p7 b1 \* g2 u' P
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n" i! D* H# P7 Z, B4 e; M' t
' `% X; q* |5 S& N- P(2)立博: 2.10 3.25 3.00 . Y' B* e8 ]0 Y# m/ B9 y
% z: \0 g# U5 g; R+ M(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t# A7 r/ @# `! e+ i
% \4 k* X, w5 x/ g( q6 _- ]2 N(4)易胜博:2.25 3.10 2.95
) \( p$ u9 Y, K" ^7 `- U+ {+ l. `) m% ~. _: x% d; x+ A* m5 z1 C+ l6 f2 p
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
, S# S. X K1 T4 R/ Y2 z3 n5 F8 F, p$ }' ]( i% c
3 G/ s/ G T! ~2 n5 P1 @" N; zS1=2.22 B1=3.15 F1=3.01 & _& E) o1 u |1 o) K$ D
; g( l; R' L0 [1 T( e
S2=2.10 B2=3.25 F2=3.00
0 v( m/ S3 g) h4 s% a0 `% ^# T/ X4 W2 j% ] s
" U+ k2 e$ n2 p* q5 V3 W! F) W: w, ZS3=2.20 B3=3.10 F3=2.87 : j, |& ]# n+ I2 h4 P0 W, o
9 A' e& q. H7 B1 c9 S5 j
4 Q3 R( |3 ^0 t( C* cS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \$ Z& {+ c" ~8 v. f
8 w( d5 ` _0 H- N/ h7 V4 v3 t4 {8 `5 e1 a6 R
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 7 Q9 N: G5 w: i7 _; \% V
& X7 R9 [2 m( f1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l" j& w9 I* ^( Y$ j! \' ^
# O# s0 @. j5 n; `# P
1/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
- _5 Z# i# I% e+ {- d9 A+ ~& O" H8 [
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
$ ]; ~ g' A& O, w( z# l: G+ x9 Y- y- K6 r
& ?! r1 J5 c( k, ^; jS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
5 S" b( e8 {3 C2 V; A3 h8 y u7 S; ?$ ?
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j5 \4 Z3 ^2 E8 T; R' I
* H0 g$ z+ Q& c) zS1'=41 B1'=29 F1'=30;
2 ]# ~' D ]+ ?1 ] _1 Z5 o# j, t% v( D1 e
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s. G0 ~# [0 u# g0 |7 S
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0 o. f9 b( y- P3 TS3'=40 B3'=29 F3'=31 ( o1 @5 i( a) G, h4 f2 V/ N
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a3 j# z+ E1 W3 ^
S4'=40 B4'=29 F4'=31 0 I& n$ |3 a* k o9 Q) f
: B6 y" Y' M2 }4 T/ O0 g4 ~! c/ \! {) r: i! `
(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$ A! p0 J8 z% b/ O& k
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
( G0 X& U' @7 P! q5 s) q( ], k9 L T& t9 e, ?5 d2 `. u3 o
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
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4 h+ L/ [$ i y- y+ W! c! A" v" lF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
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+ d/ N; [, O e" K0 v! S于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
8 } }# n& A' f0 G) J- A0 k9 E ]' p: I. D7 h. {2 z4 J" t' a6 f, Z
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M' E2 w' U4 X/ E' M
+ D$ n) P# X# M* c$ W, q) C* l* X: m3 v& A
G11=B1*B'=3.15*28.75=90.56
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G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]. l9 H _, N7 o7 K
4 Q# J' L, G' I1 K, L) R: v
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 \
1 O# p0 R! E) J- N$ V( b) D; P6 C* |* h W0 f7 S7 s3 A2 @. G$ i
0 R. Q K) r* M$ B n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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