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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑 
9 q% [! r7 B$ `& Y" S* f/ a/ y4 p# R- a1 ^9 v! c3 B+ B& X) I" J; }* L# C, ]7 u 
凯利指数的计算方法:    ( O1 m2 a  L3 d; F& D  k8 q$ K' |4 U0 e! E4 F 
3 A# e8 g6 l$ _5 x4 V 
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) 
" B9 D& K( G7 K1 s* v' B- O4 Y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& U# M# {: C( k' o* z" L; e 
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!     
7 y$ a3 K! C9 {$ E  ^6 t) y7 e6 Z/ _5 C5 S: K8 T8 s 
) d, g( M! ^' Y9 `做下算术了:    2 i( y$ \  W: ~: {8 \" ` 
4 H: o" z; Z/ K" }; ~' L. y! k5 F, M& W+ d2 K! @: M1 h4 U- C6 x 
(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n 
# V# f( N0 K/ X' e" Y7 B' l8 K7 f0 \8 M" z; d3 Z0 u 
(2)立博:    2.10    3.25    3.00     
* `( A  F" `- b$ y) c- I" G. P1 V& d) j+ O9 D1 W 
(3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t 
  \0 f' j+ s  Z! z4 ?) K 
6 X. I! b7 A: P3 {(4)易胜博:2.25    3.10    2.95    # T, \+ C- t! j0 I( I 
- U+ {+ l. `) m% ~. _8 g  V; E  t* X- F6 Y( O( Q$ q 
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    6 P$ c+ q# R8 S 
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$ K+ p) _+ m$ @; ]8 ~3 D5 v2 w' DS1=2.22    B1=3.15    F1=3.01     
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+ T, Y1 r* g: D1 h' ZS2=2.10    B2=3.25    F2=3.00     
9 x  Y! G1 x" X0 t( g* q; a+ h' T% ^# T/ X4 W2 j% ]  s 
- l7 [5 ?0 n' FS3=2.20    B3=3.10    F3=2.87    3 s5 f8 j8 I) t2 ]6 @ 
9 A' e& q. H7 B1 c9 S5 j 
% D4 l$ [. c( U" U* \1 W, i: @S4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \6 G% D( M* u9 h) ? 
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1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01    =>    r1=0.91     
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' N- E3 R9 ]) g2 {3 l; s5 h0 @% |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# Q' I9 x* t3 z6 P6 o: |3 n: n: o& L 
 
+ K3 M0 Y+ z7 V/ {3 Z, G3 e+ f1/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 
( P. T% X+ J  ^) H' y+ V/ p& f5 d; c' i7 E" f2 c1 o( ~2 C! s 
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90     
" O1 i" ~! L: e% h% R: G+ x9 Y- y- K6 r 
4 ~2 |5 k( d0 d0 TS1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T6 `7 e/ g% Z' C- j( c 
 
2 q7 l) q" Z6 K, }" F( J& z类似的计算后,于是:    # s3 M- z! s6 q8 s- Z8 M  j; o/ l, ^, `6 S 
 
, p4 V. L" ^/ v) `  QS1'=41    B1'=29    F1'=30;    8 _$ m4 ~. c. N* T7 w& [1 M 
 
; ^; E$ H  ~5 U8 ^S2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s; p' q: X. _8 [& Z+ n' u) l/ l; P* U 
; m' V% T, u, P% O 
: f% m1 z# `% p( e' `( MS3'=40    B3'=29    F3'=31    2 i* T2 o- k* G. N2 g% N7 K2 V 
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& i% X3 W+ R/ D( j8 L1 K+ T  z# k* MS4'=40    B4'=29    F4'=31     
  N1 I6 }* q) _- v: B6 y" Y' M2 }4 T/ O0 g4 ~% X7 v! X& ]/ e 
(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, b: J1 O  G' U 
* R9 Y/ Q" p9 \ 
' g7 f% R3 v# T8 C好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41    . I" ~2 ^: H9 Y  n( v' o 
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0 e; L0 U2 \5 }9 o& ]+ FB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75     
# V) d' D. }+ @- B- Q0 u5 m; P9 m! N& Y) r& G- { 
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5    ' t$ A- e( x1 g+ \' K/ a& _6 {* P 
1 y% b3 s0 l% U: ] 
于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?' q# a0 Y1 i( L, u. t( e2 t 
9 E  ]' p: I. D7 h. { 
$ ~, i- W: a# W/ O! _, l% oG31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M& ?  ^+ a! S, Z& a# c$ ] 
+ D$ n) P# X# M 
/ I5 `; B8 V3 d3 D- M. }" BG11=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 ] 
; X3 g( @- ?) Q) w- v# ~7 C* y" T# y3 ? 
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 \ 
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) I* _. E$ q' m# o3 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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策小分:  
总在线: 100 小时 
本月在线: 0 分钟 
 
 
 
 
 
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