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| | 本帖最后由 凯利之王 于 2009-7-13 09:48 编辑 + J/ V& u6 }0 w5 `4 ?* f/ a/ y4 p# R- a1 ^9 v! c7 a" ^6 j" s7 F
 凯利指数的计算方法:    ( O1 m2 a  L3 d; F& D  k* S7 y+ _# X6 k# W& f; V, g& e
 
 7 h8 v( i% M7 f& r: ^8 X+ WG3=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)
 8 n: L8 p- Z' R' L+ m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. [0 L) i, t* g% P9 `
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 & t" ]0 @) w! L( u* H% h3 d- C4 U) E( [% W% z) O
 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!    * T7 |( Y* c$ A, j. M: c
 7 e6 Z/ _5 C5 S: K8 T8 s0 Q# t; J0 k& C" l- c4 z' E
 做下算术了:    2 i( y$ \  W: ~: {8 \" `
 # V" S- a1 [; u0 e4 j* \! ?& {; ~' L. y! k5 F, M& W+ d
 : R* M' c. ~0 ]: U% H(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n$ r% ?2 r2 x* h: |  R+ _
 
 ( J9 Z/ I5 ?- }(2)立博:    2.10    3.25    3.00
 7 o% K5 v3 [7 V& A5 B$ |; Y. I8 y5 X8 [6 d( V8 K; l( x0 z( b2 m
 (3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t
 7 e. H  ~/ X# Q/ k% u% I/ G  e; _) I  L* W' b
 (4)易胜博:2.25    3.10    2.95    ( M. @: o6 @; ~: u3 [2 i& D6 l0 V
 - U+ {+ l. `) m% ~. _
 ( v+ F" ~8 G0 B( c; M6 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    7 e# F& o9 w9 X! G
 5 F8 F, p$ }' ]( i% c
 / n; t$ I; L/ q" SS1=2.22    B1=3.15    F1=3.01    0 @/ D: _  e3 {- S/ r: o
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 S2=2.10    B2=3.25    F2=3.00    & v, _6 C  P* Z3 ]( L
 % ^# T/ X4 W2 j% ]  s3 H6 m" ]5 {8 t; d  o" J. s1 v
 S3=2.20    B3=3.10    F3=2.87
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 . V" w  t. \/ v7 ^/ G+ }8 e/ DS4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \
 8 W& J( U2 @/ U" F+ [$ e8 w( d5 `  _0 H- N/ h7 V4 v" Y# e" H+ z4 G/ K7 v! l
 1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01    =>    r1=0.91
 8 u) d& ^. S- M+ c0 x
 % r# V& ^, I. S3 ~# T1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00    =>    r2=0.90    # t0 ?( P  e* X% l, ]. g0 _5 b5 F- J
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 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
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 1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90    0 U, v. z: B- M
 : G+ x9 Y- y- K6 r
 5 n, D- H& }4 g+ a8 ES1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T- D1 D8 F' J$ b
 4 `  F9 _) Q0 T
 类似的计算后,于是:    # s3 M- z! s6 q8 s- Z8 M  j# z( n* Q' Y% V' g8 ^
 
 9 L) X# R' ^0 K. nS1'=41    B1'=29    F1'=30;
 ; p7 t- r" e0 l' Y% i
 0 T5 V( ]3 p- e- zS2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s4 ~1 A# w8 x, Q: c! |2 n
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 : G% x) z+ F; ZS3'=40    B3'=29    F3'=31
 $ j# B2 V7 f: \& ~6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a" O1 J) {4 |8 s& P( ^- y5 v! Y
 S4'=40    B4'=29    F4'=31
 9 S" Z& r$ v# s6 b3 g' j* q: B6 y" Y' M2 }4 T/ O0 g4 ~
 7 w" P' m2 w8 s( _& o4 ~(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( [. o4 ]2 Z, d- g7 @  a  E+ _2 w' ]4 s
 * R9 Y/ Q" p9 \
 - }7 T! g0 C% m  d( w4 \好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
 - R: r- ^& P# r; |2 q2 @, @) q( ], k9 L  T& t
 5 T' V+ E4 K5 b& [9 G0 w$ ~  Q+ tB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
 3 N. ~+ M) F3 Q! ?& ~+ z/ j" U- N% Z$ f5 U' p: ?
 F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
 + h* Z8 c0 T7 J+ y" \. ?5 K2 X% P4 z+ D3 d' T3 R8 N8 P
 于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?
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 2 c# ~3 q8 G( U' ^: s, U5 C& B5 CG31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M- x$ L. _5 G1 U
 + D$ n) P# X# M
 % S7 f3 {  R% A7 AG11=B1*B'=3.15*28.75=90.56    5 l9 |* K, g. a/ {) Z% h, N
 
 $ ]5 l" q1 y( M- AG01=F1*F'=3.01*30.5=91.8    2 b6 B# O% q. }" I: W0 ]8 p0 L. K# _) r  y2 s
 
 " G7 e5 w7 p; N( K" \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 V8 W" D* ?2 q  Z5 y; M6 C* |* h  W0 f7 S7 s3 A2 @. G$ i
 & ?8 o3 S0 r  l; j5 T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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