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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑3 n. E4 ?0 q: k/ ^+ h$ G% K' v4 m
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
6 Q$ x" `7 y* ^% M1 |0 `: e; ~0 @* I: v) u& j# I
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 M/ A+ s. i x7 o, C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. [
# p9 h" h1 R, ^( j1 Q% X$ ]1 N- `* k: g( N, e, t" a
& t" ]0 @) w! L( u* H% h1 @2 f' Q: M8 g; M+ T2 {
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! * |& F Z7 l ~8 H+ M5 N: R5 M
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做下算术了: 2 i( y$ \ W: ~: {8 \" `& W) a7 s$ x; d, f t
; ~' L. y! k5 F, M& W+ d
m( p0 l4 {) v(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
7 h+ B# Y' N1 m3 G
8 v* N& j" S7 K) C9 V1 H: T3 M(2)立博: 2.10 3.25 3.00 & ^% V. T7 L+ ]5 ~5 Z- ~. `, h; ]
3 l: h. y, Z/ P9 i* e: u V
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t+ p. C7 H* L: N9 [# i
$ d0 B4 o. K$ x(4)易胜博:2.25 3.10 2.95
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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
+ \4 `7 [7 D1 _- m+ o: Q/ q4 ?5 F8 F, p$ }' ]( i% c
. M0 D1 ^& z4 lS1=2.22 B1=3.15 F1=3.01
" S3 f0 j! ^' D! t+ }7 A5 z7 w- r; Y( }! ?) u4 _! v
S2=2.10 B2=3.25 F2=3.00
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' [4 [: x0 [7 h* c, yS3=2.20 B3=3.10 F3=2.87
& `( c7 c3 t, n: ^! z! @. y9 A' e& q. H7 B1 c9 S5 j* [* p7 }4 T t3 s6 G4 n# t) f
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
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1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
( \3 |1 A V7 c6 m7 d, M) a2 ^2 K
& h- N; o- P+ z" @ t2 d1/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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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
% G0 ?, \! z/ k4 [: H
; Y/ \( O- b6 J; r; u: W& A. M5 ?1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
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S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
7 u8 P# z5 D# e: W
5 Q# e3 l0 ^. T. E* m: p& k, u类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j8 x. @: i0 P+ C9 J
9 o+ U" `$ D v/ k& x
S1'=41 B1'=29 F1'=30; ; S5 v, |$ d# W. a
4 L. ^1 y% @) f9 `! BS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s" F6 z% [2 m+ y7 c( x7 r+ g
; m' V% T, u, P% O+ h: F0 |" ^" r+ I1 }
S3'=40 B3'=29 F3'=31
$ ~! ^: T# ]+ m+ o/ ~* z6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a) ]7 |) I2 V8 q( [. ]# h# k8 q
S4'=40 B4'=29 F4'=31
1 J2 g" s+ N. E: B6 y" Y' M2 }4 T/ O0 g4 ~
$ ~" q: [" ~9 V1 j1 w( L(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
8 ^; n& q- U* `. D* R9 Y/ Q" p9 \7 U2 y4 \( I* r) ?6 g! Q; |
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
$ V( D5 e* a/ l9 \0 S- J; q) q( ], k9 L T& t" j5 L( X; ^ g( S0 t( f; R& ]/ Q: @
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
# T* h5 i9 `2 ^8 x. V
+ x/ E' [3 f. p. r0 @$ U- |F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 % ^" Y" L' [9 L! F6 M
' W" }0 B% D: K1 G于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
( d& y1 f0 c/ }, `# q. T" M0 t) L9 E ]' p: I. D7 h. {
5 z4 J0 {+ M. D' a# cG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M) y1 V! e! @# k% o, ~+ r% u
+ D$ n) P# X# M9 `. r* z* X' X& m' G) n
G11=B1*B'=3.15*28.75=90.56 , [# p5 ]; C+ g3 k
* K# R6 l3 P3 \$ Z' e/ O3 ?G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]$ `. a5 b, y6 v- c$ Z
6 e* l8 x) i& _
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 \& a7 J2 L$ Q& X! o) T
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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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