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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑' I9 U2 k# j3 ~
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) u% `& q y; \1 u. I凯利指数的计算方法: ( O1 m2 a L3 d; F& D k+ q7 ?' c- x# ^3 A- _( O" P; I+ |
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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)8 H) d1 |9 J& n( M- @+ ^; j' 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. [! i+ `1 X+ U. Q' T2 C
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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!
& p5 H* w# H: C+ s) p& V: ]+ w5 U7 e6 Z/ _5 C5 S: K8 T8 s' a6 Q; d @- T9 y! J" v
做下算术了: 2 i( y$ \ W: ~: {8 \" `
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# A, z" k9 b" u+ x4 ~8 t' s(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
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0 h3 j/ T/ d* I" `(2)立博: 2.10 3.25 3.00 " g3 {1 I7 _' ?& a, S& ]
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(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t) H: D' x' m- ?; o& a( \
5 x( C: V1 p' }(4)易胜博:2.25 3.10 2.95
1 P: q: F. ^$ l) `' A3 o% d- U+ {+ l. `) m% ~. _
) h) x% S' N% m% U7 z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 ! d" U9 u; A5 L% J. f1 x+ ]
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) E" {% s. x9 N: w! S& @, s8 ?S1=2.22 B1=3.15 F1=3.01 - ]: Q7 }0 `3 l8 ^/ u" v
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S2=2.10 B2=3.25 F2=3.00
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% \6 ?) O* D; n8 ~8 Z2 zS3=2.20 B3=3.10 F3=2.87
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$ A5 U, U4 }3 W* G9 w9 qS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \0 m' d2 ~, A& G; M, J
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y( D5 M# M a' k+ _1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 / A3 f* u: |- V& }; y1 Y d
3 |4 R2 K* O: m- b5 x2 ^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$ t7 }+ N* A3 [9 {4 |2 k2 w
' M/ i5 N% o. k# N, T' N( b1/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 & K: e* U- m* h- k( ]$ m0 _- T4 ~* [
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S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T0 {2 N7 S" A' r; b* _
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类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j k1 q$ j3 N) }9 o: L. Y
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S1'=41 B1'=29 F1'=30;
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S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s. L4 }( x* m6 b/ I& l, }, @& b
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# S( E. e6 q5 ES3'=40 B3'=29 F3'=31
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0 f$ _3 @9 Y2 @( VS4'=40 B4'=29 F4'=31
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. o0 r0 q! S) L* _# o3 Y(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) G: y* m8 ~$ g' Z
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ; @; V. u7 R5 h2 t: u
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 * G) H/ y) I r9 _
p9 V7 u( E. }* z: v2 c" FF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
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7 ~( X/ Z/ [+ q! O于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?0 B( |, j1 Y3 \1 T/ h
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# t8 P- ?7 j7 Y- j# a DG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
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' b; L5 Q0 Q# Q; jG11=B1*B'=3.15*28.75=90.56 0 g% {5 k' a2 w4 ^4 V0 v
! p8 u' `. B4 w( zG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
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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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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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