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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
- {# `5 U/ @5 q5 |! N* f/ a/ y4 p# R- a1 ^9 v! c
6 j# v/ I) L7 H9 e5 X凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
) g5 P y$ d/ O! q" K! k0 ~! ]9 q, @2 D& ~, U
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)
- I0 |; I# a8 a) R0 K, Q$ J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. [
8 H% \' L) l9 D4 w3 b
/ T/ F% B+ ~: ?0 s" K e9 q& t" ]0 @) w! L( u* H% h
) H) d2 |) V5 S$ `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! * G% G9 D% Z @$ n9 J2 i$ p
7 e6 Z/ _5 C5 S: K8 T8 s% z3 D. R' T) R! u6 z' U: S2 }
做下算术了: 2 i( y$ \ W: ~: {8 \" `! R9 \6 Q% x( w9 T
; ~' L. y! k5 F, M& W+ d
1 L- [: z# k. f; Y* d(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
6 i/ t7 [1 o$ d
: w& j$ l* ~* N/ S3 H(2)立博: 2.10 3.25 3.00
" G: ^8 ^3 ^2 N9 d# n5 [" a
& G- t d" ^" @5 O" v Q6 w4 V(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t3 C7 M: I2 u9 i' l% K
) z' @ `8 ]& [4 [
(4)易胜博:2.25 3.10 2.95
6 k1 B+ \) h4 R$ N6 i$ [: w- U+ {+ l. `) m% ~. _
& f' {) ?6 ^$ F$ d1 b! q2 R9 t1 h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
3 V+ _- ?0 n! @% H6 N; t% i5 F8 F, p$ }' ]( i% c
2 b7 `1 X7 i3 d ~5 mS1=2.22 B1=3.15 F1=3.01
: b+ e1 }2 G7 M7 I$ P
/ t. X/ E& u* vS2=2.10 B2=3.25 F2=3.00 5 Q: o# v; ?. }& {0 y3 N
% ^# T/ X4 W2 j% ] s) {0 k) t# p; U7 R: r
S3=2.20 B3=3.10 F3=2.87
6 \, l: t+ p# ?" @1 V% b9 A' e& q. H7 B1 c9 S5 j
% L3 c$ D7 k3 V! @" ~# _0 q3 YS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
6 d$ h8 W) ?7 e6 @8 w( d5 ` _0 H- N/ h7 V4 v" A) B% S& U8 i
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
* h8 N- z+ {: B/ ?- `3 z! {5 u, {& ~
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
9 H/ `4 }" j# S/ A9 ` c( Y4 J( v: U7 i! B
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
- @# H9 U H. I+ o1 q0 M* g- Z& O7 {% p! k: B6 g# z6 L1 c
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
, b/ U2 n2 i- O5 g: {: k; ^: G+ x9 Y- y- K6 r
. o" _: [7 Z# Y d0 W/ H. sS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
$ j% o$ Q+ _' ]1 [! s3 s
4 {$ F) c! |0 [3 |类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j' m( V- H" {; a$ w0 u* ]
U& [) {* T1 T% B: L/ i1 G; q- FS1'=41 B1'=29 F1'=30; 0 |7 J8 w- {# H! T
* z* S0 M; K9 x) n# Q2 M; J8 q; j
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s r- G7 l2 A! ^5 Y& \. y, i
; m' V% T, u, P% O
N' P% X/ Y2 m/ n: r3 ?8 ~/ h# hS3'=40 B3'=29 F3'=31 0 [0 r v' g4 u+ R7 g2 O
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a% r( L3 ]# ]7 T: Z' P) w
S4'=40 B4'=29 F4'=31 2 P4 Z8 m2 @& `. m
: B6 y" Y' M2 }4 T/ O0 g4 ~
+ F& F. m% F* A3 x(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( [. o9 p* ], G8 e& T5 M+ A4 e; e6 J
* R9 Y/ Q" p9 \
g- Z3 s& T! _) j8 W* a: e% s- S好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
1 A5 B- X8 i6 Z" d7 L) q( ], k9 L T& t5 k+ ]8 ?7 j5 c5 L
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 3 S, @2 t. _! [: U) ~
7 R. U2 s/ c( S; I8 pF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 9 {; d2 t+ ], F6 d6 b. H! M
& K6 |/ ^$ |+ h: ~" q% l* c; l于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
& x) Q) Y$ p; s9 E ]' p: I. D7 h. {7 ?* z& ?# [1 B( C. H
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M+ o2 A# L" v5 i7 x* p
+ D$ n) P# X# M/ L( y# x$ N/ R: \
G11=B1*B'=3.15*28.75=90.56
2 ~3 {% S- O% }5 @0 W& n
% y* a9 u+ h- SG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
. t9 @ h5 w" \1 m! T# P
& u& g U8 T- G& Y6 T" s) I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 \3 c( O. r- }$ q( M! e
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
- j7 t2 Q7 t t/ {/ i- v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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