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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
* i- }% t) M6 W& i% _( J" G" A- p* f/ a/ y4 p# R- a1 ^9 v! c
* v9 f) `. T0 @) K, g" r9 `凯利指数的计算方法: ( O1 m2 a L3 d; F& D k; N; Y, \' g6 s+ A
+ {- Z) L/ b6 S" R7 M& \6 v8 XG3=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)
! m. i& H) ?6 l* H1 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. [" i7 F. g2 V1 x" j4 K
% }, s- v6 l) h* g
& t" ]0 @) w! L( u* H% h9 f0 t% L+ V0 t% o. f. h7 {
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!
5 w3 X6 a0 q" z7 e6 Z/ _5 C5 S: K8 T8 s' E; L$ W, R3 a' @/ t' H
做下算术了: 2 i( y$ \ W: ~: {8 \" `
. p; s( I+ t4 }9 m. [; ~' L. y! k5 F, M& W+ d
4 _! ^' u: ]5 ?4 e(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
8 J+ Y, t1 p8 o
& S6 a# Z, j5 L- I+ A# B(2)立博: 2.10 3.25 3.00 3 U3 g6 U$ I* T* n& K% F S9 }
5 D; D! f: f+ l5 F, W( \3 B
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t9 ~- Y# M. X+ X! T6 N
& O% K7 {4 o8 Q# l* ]* J(4)易胜博:2.25 3.10 2.95
/ C9 u8 I2 L' |* V( T+ N! ]: ~- U+ {+ l. `) m% ~. _* @. Q5 `! ^& a. D
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 : b2 ]6 Y v/ H: G" `
5 F8 F, p$ }' ]( i% c
- l; t: h- {8 c3 v n4 A5 ZS1=2.22 B1=3.15 F1=3.01
7 [: |) R" K7 n; l8 O8 ?! a! n; \+ |- O; @) h" @# x V* I6 H7 C2 i* \) y
S2=2.10 B2=3.25 F2=3.00 ! G3 v6 P* X! B0 \
% ^# T/ X4 W2 j% ] s
" O: D9 w2 j: ^S3=2.20 B3=3.10 F3=2.87
4 P9 E9 I! s. ]( ^% q7 N9 A' e& q. H7 B1 c9 S5 j
5 Z1 b8 L( C! jS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
7 b( ~1 u1 X# n8 w( d5 ` _0 H- N/ h7 V4 v
1 x$ V. R$ ^! ?9 ~" j1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
3 m x4 A3 R, E; ?4 @. U( @& L+ D
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l6 [% X4 F+ a5 O- H2 X
. j8 r* q8 V- K" D6 A Q
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' q3 u3 ]' g: `7 c; e- K* [
; [. h9 C# W' T/ o3 E, b
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 # l# Y+ X! J N r. T4 n; A
: G+ x9 Y- y- K6 r* E, G# [/ D! L6 s7 ~+ c: `# e
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
5 T$ H7 O. Z& r6 I( f* _. K+ F% x) m0 v5 Y! r0 {
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j% ^- b8 u" b+ e# k6 N
* K' M ?, E# s, g9 z
S1'=41 B1'=29 F1'=30;
# w* ]5 i! s. x/ r" h* H
* k, u H: R2 b" _S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
7 ` i* I' `3 T; m' V% T, u, P% O8 }1 ]% \8 Z5 E! O$ Z
S3'=40 B3'=29 F3'=31
; G ?, X1 p3 S& c. g* H& F- s2 ]6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
9 m3 [, _6 Y- w! h1 j) m; _S4'=40 B4'=29 F4'=31
! R/ l2 o( ?: p2 D' ?: B6 y" Y' M2 }4 T/ O0 g4 ~
" O; G. ]3 `0 r' s" E: |0 l H: ^ b& P(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
g0 w% E* h. N* h: X* R9 Y/ Q" p9 \/ ~$ y; U! S$ ~9 ^7 ?8 ~9 P
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 " Y5 k7 o7 l, G3 O# O
) q( ], k9 L T& t
* ]% X2 t+ @2 }, B$ i5 R! FB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
- D" C. l p9 @
|& U/ o/ c* \* J0 P) B; d4 x# HF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
, i8 A7 A- W/ M' M4 o
( t9 A! x/ Q \9 s2 Y于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
% Q! ]/ o( f8 O6 S7 t; H$ y) ~- S9 E ]' p: I. D7 h. {* J' l/ l& f3 R( _8 `- N
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
' q: Q/ u& p( k' I8 m- k+ D$ n) P# X# M
; Y( N+ E1 r$ g, ?G11=B1*B'=3.15*28.75=90.56 8 C& s; ~ I& D% l& A
: m" p9 b; s d* x, |; N& ~
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]. f$ V3 K! I& o) O5 m1 |/ s: B) D
$ Y! q8 I" i/ Y0 E
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 \0 `7 Z" ~7 R8 _
6 C* |* h W0 f7 S7 s3 A2 @. G$ i; t$ D/ D8 V0 p: O+ `. F
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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