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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
' ]* Q9 C6 w- g1 T7 n" i* f/ a/ y4 p# R- a1 ^9 v! c7 \9 D$ G0 N k" `% }, C
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k+ ^* a$ P: c2 F" s
+ f. |2 E" Q- 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)( _. e* G- S0 x: g6 d( b7 ]5 G
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. [6 p+ q1 e$ c0 ?7 S) B
8 o' N4 n* c2 ^
& t" ]0 @) w! L( u* H% h
" K. L. n) h2 e! u$ 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!
; {; G. O- O5 p" g, C' W# l7 e6 Z/ _5 C5 S: K8 T8 s3 {8 f( o3 x" |
做下算术了: 2 i( y$ \ W: ~: {8 \" `1 G7 b1 e$ O. r- [& ?( D
; ~' L. y! k5 F, M& W+ d3 G4 o3 U( g5 _ \7 H8 d, ~: Q
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
+ A$ N3 g T- k1 ^( T# v' F) d9 U# C; n
(2)立博: 2.10 3.25 3.00 ; q4 P4 d8 J$ _$ H! c5 r6 x
1 k, {% t6 y n(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
5 u4 D. G$ P# ? L5 n
/ e3 F# k- b) _5 s(4)易胜博:2.25 3.10 2.95
% J' k8 c2 p: L% r7 X- U+ {+ l. `) m% ~. _
. Z# B& s8 q f' m5 T* U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
% u8 B; L" D. Y* \0 ~( ]& S/ y5 F8 F, p$ }' ]( i% c
' M( y& Q" d7 M2 j3 H, R5 IS1=2.22 B1=3.15 F1=3.01
9 x: k0 {- Z& S$ Q0 @( }, @- ? b1 c+ {3 O: j5 L. V
S2=2.10 B2=3.25 F2=3.00 5 D$ s8 H- B8 |6 O- c
% ^# T/ X4 W2 j% ] s: b) @6 |6 ]" K N+ W
S3=2.20 B3=3.10 F3=2.87
3 [: Z4 z0 x! c" H& H. y2 y9 A' e& q. H7 B1 c9 S5 j* C, D; G2 Z& Y
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \9 h, V+ u) t% w7 T
8 w( d5 ` _0 H- N/ h7 V4 v
$ D# I4 Q- q1 t5 D! [/ I# K1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
/ \% O- `: F7 F: c
/ _1 I, i9 w& x* s+ N1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l- j6 O& W. H7 ?4 ]
/ u8 ^7 X2 P: O
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# K0 O, e% s3 J
8 _( i7 i1 w# O. L' Q4 e
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
2 ]) U! E5 x* v, Y$ k: G+ x9 Y- y- K6 r1 `& g) X" ~ T5 Q) y
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T. Y6 }# g9 a- x- p7 |
' u s8 U! H% v" y9 \3 `. N
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
5 g. h& h) ?( k# s9 l# }. y, M W W" x8 T- x
S1'=41 B1'=29 F1'=30; ( q& d* M( A" B6 d( ~2 f) Q7 w8 f/ T9 Q
) s# \) h' u% F1 C9 L+ nS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s4 C' b. }3 F7 n5 R N
; m' V% T, u, P% O
?7 t* y* f' }' w3 d4 W' C6 rS3'=40 B3'=29 F3'=31 , B0 r R7 F( S0 Q$ T5 `
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
8 s+ ~2 m+ i# \8 j5 pS4'=40 B4'=29 F4'=31
' q- X: r/ g1 v, a( a( |" w: B6 y" Y' M2 }4 T/ O0 g4 ~1 Z+ u9 |0 p8 M/ C/ @# t
(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. `# [. M. l5 h8 ]% x- O* R9 Y/ Q" p9 \* y+ D6 [8 B. t7 Q+ r' D
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
6 Q8 E5 |. O' L( w% C( G& Z' k" q) q( ], k9 L T& t3 h5 a& e% O J3 e5 k9 w6 o0 Z& t
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
" C, y- a9 p3 ?) S; @, q$ r a, y* x. K
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
& {1 G% c' v4 S/ f4 ?. G1 m- Y1 C; q: \/ A+ Q9 V b3 a3 k
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?; q+ W! ?0 X3 {+ A; H
9 E ]' p: I. D7 h. {
" X' W1 k& t$ n; F! l& IG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
2 G; a; \3 s1 N7 A5 S+ D$ n) P# X# M
5 e/ k* n ?/ A1 T9 w1 F hG11=B1*B'=3.15*28.75=90.56
. o i5 Q, { m# j
' \- o' z2 O* c% A; [. a SG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
1 f) v# i9 r' k; N3 q- l" F- Y
8 |) O+ k4 Q+ f6 d' ]" [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 \% v5 T8 s D- m5 W; R6 c5 b
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
6 [4 d6 |+ q( P# A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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