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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑/ O! l) y. Q0 F9 d
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, n o' K. \: s凯利指数的计算方法: ( O1 m2 a L3 d; F& D k4 Q, [0 Y3 C9 ~) n, U( n
1 M6 R6 H) J9 H. l% O) m
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)7 }( R; }- Y/ Y( t9 u5 L5 h
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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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!
8 E! x- y$ T" k6 E7 e6 Z/ _5 C5 S: K8 T8 s% y4 _0 n3 ?9 D& U8 |
做下算术了: 2 i( y$ \ W: ~: {8 \" `. O2 x3 w. } B2 ~
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
( X6 k* q9 a& D( v0 t. s5 H _; _
}5 ?5 j+ T, O/ |% U0 W% o' G(2)立博: 2.10 3.25 3.00 4 d0 R: e' r( ~0 f: @" j
1 C3 ?4 }( B# m a2 M; n, e(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
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5 H+ w; z- P- D& {9 r/ F7 Y* ?7 b' F" l(4)易胜博:2.25 3.10 2.95 $ h- I5 c6 r6 ?" k: o/ [5 F
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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 ; w: J9 U# u: U# _
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1 [( y( m# a, I4 {7 p6 e1 mS1=2.22 B1=3.15 F1=3.01 # U9 x, l9 L1 r
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S2=2.10 B2=3.25 F2=3.00
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) W9 c7 d9 l( P" y- QS3=2.20 B3=3.10 F3=2.87 , V- P& _5 `7 @9 z0 p8 C- t
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S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \- P1 ^) U% P1 B; ^5 S/ U ~8 m8 z) o% E
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# w3 m$ @5 Y& Q. r, ]4 i5 c6 b1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
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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
$ S4 z; S# {8 V( y8 y" n' X3 U2 [) M$ ]/ z1 x( M0 C# ~5 Y7 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
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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
( n9 V; e p6 @: G+ x9 Y- y- K6 r
/ f+ c4 Z7 q* |- uS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
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' r% X1 N# Q- [* C类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
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S1'=41 B1'=29 F1'=30; - w- b, C1 S% C# y9 \. Z
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S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
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: K0 n' r, Y7 P5 KS3'=40 B3'=29 F3'=31 - S; D. Z6 G0 s2 R* y$ G
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S4'=40 B4'=29 F4'=31 - ]# q! T( l, R6 o8 H3 N# Q6 g1 ~
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(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
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
# o" ?! q3 {8 p0 t) q( ], k9 L T& t% m/ J% P% _- V4 F
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 ; l. T5 E# d) ?9 \7 H+ y$ E( V) _
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
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于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?2 Y7 W6 \5 ]0 s0 Q5 H5 q4 ^6 j
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6 c: I* O' _9 _, d" W4 {7 @+ oG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
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t c) R- g) C+ Z& R& v' W/ uG11=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 ]
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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 \1 m8 r* p' @. b+ k3 P* d8 l
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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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