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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
5 A4 M' z( \: E& U1 M9 Q* p* f/ a/ y4 p# R- a1 ^9 v! c8 ]- V( s5 a; Q* B
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
5 t7 q! ^( Z$ v6 J- o' O* R8 z0 \* {# D# {( U# T
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 p5 g1 C6 q) M9 R( G
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. [
! c/ v+ @5 E# `, w8 ]. [& k; o. U5 W( G4 v( _9 H2 m) t
& t" ]0 @) w! L( u* H% h
" \: }( u4 T4 K. H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!
- u5 D9 d1 z9 p' \8 |5 r3 z1 I7 e6 Z/ _5 C5 S: K8 T8 s4 B7 c2 V! T8 i+ j; {
做下算术了: 2 i( y$ \ W: ~: {8 \" `2 g" M3 B" z( c9 ]0 g/ h' J
; ~' L. y! k5 F, M& W+ d% l+ E6 F) j9 N7 n7 G
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
* [! p: T9 I- q& J- t
m+ K- h' S1 Z% U; p% O(2)立博: 2.10 3.25 3.00
G" A( ~4 q! \; v: G5 f
: l) h$ [0 }& Z, \' I(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
2 _( A7 g) f9 q& R
, t/ H. G4 h6 r \(4)易胜博:2.25 3.10 2.95 4 o2 j4 Z7 s5 O: I) T. ?) A- @
- U+ {+ l. `) m% ~. _
) _8 S e. ^$ { g# Y# t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
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S1=2.22 B1=3.15 F1=3.01
# _6 J( y% t4 x; R6 b: P+ L2 a) P6 W+ { @
S2=2.10 B2=3.25 F2=3.00
5 d; E& c: B" a) k! f- ^% ^# T/ X4 W2 j% ] s9 r2 d% s# n- M" i
S3=2.20 B3=3.10 F3=2.87 + H) C% l) z' @4 t* w
9 A' e& q. H7 B1 c9 S5 j) y$ k* I0 S: @* X% S; f3 f9 m
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
/ v, `% q! X1 a6 B8 w( d5 ` _0 H- N/ h7 V4 v2 a ]4 T; e& J( b1 y3 Y* Q1 Y8 S
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 9 V( Y% ]* ~: Z: F3 |, h5 f& D# X' q
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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
& }6 J. l7 ~" U( X
; n) ?9 [4 P4 |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' q9 w2 h+ H* _$ G0 x4 P, g: P: G
- g Q3 j2 ~6 J+ Q6 h' a* [+ c
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
; x- O5 X; v, `" F9 a( T. p( C: G+ x9 Y- y- K6 r
, x; U) v3 M, r( fS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T2 C/ @4 }/ P! a- t% T! \
- l. H# E$ @. r/ S
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j p) N8 I I! e
8 N% L1 W! I& C' Q7 k1 qS1'=41 B1'=29 F1'=30; - S* m' Z. T9 Z6 v
' Q9 b: Z6 b' M6 h$ lS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s, }8 @* |& r3 w; o" F) X: e" \
; m' V% T, u, P% O
3 C- V/ w% U( eS3'=40 B3'=29 F3'=31 9 D# [5 q( f E U
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' _3 u0 |+ O1 c, m0 L* Z# q8 xS4'=40 B4'=29 F4'=31 + f1 C2 X* Q; m
: B6 y" Y' M2 }4 T/ O0 g4 ~
0 f: U8 b! k/ r. ^3 @) l& u9 }(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( [. o6 w" Q _$ f! @* j
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
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0 i. c" I m1 z- V" hB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 & ]8 [( g: [4 b
% }: ~' i, G( Q! L* f
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 6 i! x, B" E) h
, M0 r' [7 u: x3 P" d) {- N8 Y于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?8 ^8 n, s; H( A5 m5 `1 ]! I& Z4 r6 f! L3 H
9 E ]' p: I. D7 h. {3 e# i5 E" M2 E# p5 X
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M. [ S; u" i$ R1 Q8 t
+ D$ n) P# X# M) e' {2 J9 M3 S* Z
G11=B1*B'=3.15*28.75=90.56
) Q) ^9 \7 i# G$ n3 t3 @* [9 P
L. B! R' X J/ q' [G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
! n; @1 k& q' `% b$ E& O" k# t4 N1 c6 }
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 \
# E: i2 e0 D2 N& U8 c: b( i6 C* |* h W0 f7 S7 s3 A2 @. G$ i& j5 [0 A, R! i/ R) ~: |1 E
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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