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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑. \% Z9 X4 d# y
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) o: u2 x8 h+ |凯利指数的计算方法: ( O1 m2 a L3 d; F& D k8 {- l3 q( ^3 n8 T8 X7 Y
; x* F/ i7 D" |( a& X% i5 I K
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)
N- J% u" w9 v2 S& I3 t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. [0 N9 c* d3 j e( }' k
# q8 P! O# X0 p; a7 N4 C, V, u& t" ]0 @) w! L( u* H% h9 A1 A: T+ Y, M/ l" j
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!
$ D3 f. s; P4 k, K0 n: F- n+ R7 e6 Z/ _5 C5 S: K8 T8 s- @- B0 Q c: U1 w8 _3 w
做下算术了: 2 i( y$ \ W: ~: {8 \" `
9 X' F0 F* G: W7 U+ r; ~' L. y! k5 F, M& W+ d
) n; N( f% O! w% ]5 v$ n+ p" R3 b(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
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(2)立博: 2.10 3.25 3.00
( u8 b& B/ W# Z. Y
- {0 \: L& B% T5 P; l+ m4 j: P# V(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
- i* m/ _0 x! z$ I/ `( s2 {% d, h3 p+ m& o; _% q) o/ |1 n. }
(4)易胜博:2.25 3.10 2.95
9 |( T L& J# x: `- \- U+ {+ l. `) m% ~. _9 Q8 _4 X, ^+ O1 K7 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 4 R2 e4 R( {: C# z+ }
5 F8 F, p$ }' ]( i% c
3 b1 _) h2 M7 k% c6 e( l/ K7 iS1=2.22 B1=3.15 F1=3.01
+ Q. Y4 ^) m7 {. Y0 i3 S! q8 j4 ^$ r: X
S2=2.10 B2=3.25 F2=3.00 ' e- z- J/ C2 f5 L
% ^# T/ X4 W2 j% ] s
1 R; Q& t- u: i# v8 `S3=2.20 B3=3.10 F3=2.87
( s" A% G6 M8 Q& x1 C# s9 A' e& q. H7 B1 c9 S5 j
( ~5 w7 _1 [$ S) y- Q1 z) XS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \! n$ D7 U: [3 M8 D( I! K# Z! ?+ Y8 X$ [
8 w( d5 ` _0 H- N/ h7 V4 v/ U- H, O% o* X% t
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
: O6 i9 u+ P* K0 e ?# a& [2 m3 J s* [ Y/ F5 W
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. l1 s" r/ z1 L+ {; j
% N" [7 i0 ]- J
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# E7 o9 V! G. h3 w& Y
# |2 t4 ^) `0 ~' {1 i
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 : z6 @6 k+ l7 } v
: G+ x9 Y- y- K6 r7 B1 X4 m9 f% @5 E' d4 M% X
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
, a# u: V% f3 }: H0 v' F- Q$ C5 C
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j$ C8 |* Q+ l9 [, L6 z3 s: k: F2 g
/ S. W: }$ m! n: i+ h- I. ]
S1'=41 B1'=29 F1'=30;
9 `" _- F: y0 K3 E* G7 J/ \. w8 }
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
q7 T1 j7 s9 ~ C: Y' k$ @; m' V% T, u, P% O' R0 o! }9 V# w
S3'=40 B3'=29 F3'=31 * ]5 z% ^# e$ ~$ N: w) W4 {% v0 ]" R
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
0 F2 T1 e# A/ }% P, D4 vS4'=40 B4'=29 F4'=31
9 C8 ]) `4 t0 }1 t3 j8 `. f6 X' Q: B6 y" Y' M2 }4 T/ O0 g4 ~
0 V s+ X, N" [9 t1 w- l# P7 J(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+ u1 }0 h; ?2 m0 F% X# V' R% R* R9 Y/ Q" p9 \4 f# s6 }! r: D7 t" n7 c
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 % a: f1 O K# v
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 9 s& k( ?3 W% `' Z1 }' r
1 @" E! y+ d; d7 r
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
2 `' ^0 X4 G* T/ s+ h$ W! x% i. F' i" ^" Q! Z
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
! d" U& Y, a. I2 A& y# @8 ]" L0 X9 E ]' p: I. D7 h. {$ h% U, C, j3 m& W
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
2 q( i6 v. g- R+ x+ ]$ f* I5 x* y+ D$ n) P# X# M
' |9 {: \8 X1 c K3 d' B @5 g! p4 nG11=B1*B'=3.15*28.75=90.56
) R* n% I( [$ }) N ~% c. ]
9 e. e% @( c+ [# WG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ] G5 n. w9 q5 u7 ^
' Y K1 _2 c$ V% [7 \* \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 \( c t1 v* T0 M
6 C* |* h W0 f7 S7 s3 A2 @. G$ i, v7 Z4 \7 P8 `+ o' [
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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