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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑: A. y! H; h' Q/ B+ B, i
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% O, T" d# j6 X' V# l' s g凯利指数的计算方法: ( O1 m2 a L3 d; F& D k( ?/ _: v# \4 M; s: S
! f6 h$ ?( L `/ h( i* 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)7 K' _# e1 \( T6 L
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. [/ Q. l- C7 d$ {* N! e
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$ q0 p- c) _) C, |# q- z5 W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!
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s- ~- _7 f5 Z: ]$ j/ E8 y做下算术了: 2 i( y$ \ W: ~: {8 \" `( v3 _4 L5 I9 @+ P' i g/ z
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
7 x/ s0 }& U4 E+ z9 }" `! z: E9 o" C g" r! l
(2)立博: 2.10 3.25 3.00 4 m. s% E: I2 f* S* `' f
- {4 V( ]0 p% S8 T' }4 I
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t% F5 @$ O4 |+ _* K/ e8 I; B/ E* l3 r% ~
+ G- k8 v3 d8 v0 b(4)易胜博:2.25 3.10 2.95 5 D. J: b- Q; W Z- p- { q
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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 0 B+ @) g; L1 U5 J
5 F8 F, p$ }' ]( i% c
2 K6 g5 X7 W4 H" uS1=2.22 B1=3.15 F1=3.01 ! ] e5 P/ l! p
8 `2 j4 i# o; G2 S+ N4 g$ O3 xS2=2.10 B2=3.25 F2=3.00 " [$ K v/ p0 l+ U! E2 R
% ^# T/ X4 W2 j% ] s
2 `! w9 f8 j0 H+ u6 wS3=2.20 B3=3.10 F3=2.87 ' H7 }- s' V* z. s
9 A' e& q. H7 B1 c9 S5 j( [( ?" B- ?6 b$ u1 i$ l. T% U
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \/ R! s6 r4 ]( i) ]
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]1 B' y( X! X! n+ C2 t, E1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
4 H; G7 k$ l" a% N! ~& ]
/ J2 j# _3 {+ Z5 S) T B- X4 r1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
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6 {/ o+ u p+ }+ E# B. l7 `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 7 Q3 t6 a( L( q7 Y
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- T9 R" S9 `" E- m: ]S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T3 s0 U" k" C$ o2 w8 ?
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类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j- V0 E+ f( P4 E9 s) ^
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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
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4 F8 J, S# f* xS3'=40 B3'=29 F3'=31 % L' ^# W7 t' m3 \, p
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
+ z6 W) I1 L z I0 d1 k' KS4'=40 B4'=29 F4'=31
1 F0 [0 ~: p1 [3 |) e# J: B6 y" Y' M2 }4 T/ O0 g4 ~
) W9 r1 i/ [/ U4 _2 x$ q! R(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( s7 a8 ]! d8 d( j# p _& ~5 [
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 U, V; m0 x# M8 l+ @0 y+ Y* l
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
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, _" @" K0 I2 W) i1 N" z9 kF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
5 Q) u0 C2 |# f$ U& h5 `% N. z0 N; |2 `+ `
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?- k- Q4 t2 E8 x; p
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9 _3 o7 f% C. y3 aG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
% x; F/ L6 E8 U* I2 H+ D$ n) P# X# M6 R/ {3 n3 L2 o/ Y% k
G11=B1*B'=3.15*28.75=90.56
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r3 R6 \) K! M+ }9 M# h# A8 SG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
& d: ?: {- Q0 \1 D+ }
2 y. Z. w5 }) b1 f$ J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 \ G- |# t( \/ a* |7 T9 ]! X5 x
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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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