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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑, C' Q, y3 M, b# C: `$ y
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$ r2 F# J5 `4 @. k凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
& q$ U# c" L& |) m K) M
! |" o' E. y; j* r# Y. \+ {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)
' T5 ?9 l0 _* x2 V9 |- Q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. [" } Q9 J) }- w' U+ B
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* `7 _1 c% e: ^6 O4 w( j: _5 L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! 2 y1 C% X; _( e k' g
7 e6 Z/ _5 C5 S: K8 T8 s5 h3 o3 ?0 u2 [ N) N) W, G' C$ D g
做下算术了: 2 i( y$ \ W: ~: {8 \" `5 `+ Q1 C5 t2 D; Z
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n+ |' O/ f/ |7 c2 `5 F
$ u. u% H' H( @1 H) C(2)立博: 2.10 3.25 3.00 + ]: Z! q4 ]3 f+ J
x9 |4 B4 t% w; H1 }$ Q(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t0 P9 @9 E3 M7 `4 h/ q+ L3 I& {6 g9 R9 N( H
+ v4 w( H+ Q" W/ ~! B
(4)易胜博:2.25 3.10 2.95
! E4 f. X* e& ]6 W ]4 h. N- U+ {+ l. `) m% ~. _ Q2 g( L7 @- n! n! [
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( y+ }$ E0 M( v c' d9 {# i
5 F8 F, p$ }' ]( i% c' M# R+ ^8 k" n t4 A3 _/ D
S1=2.22 B1=3.15 F1=3.01
$ [$ M& J% C) `3 k+ b1 e; ^* R6 I5 ^. p5 Q+ G6 _
S2=2.10 B2=3.25 F2=3.00
( K$ G! a4 m# A% ^# T/ X4 W2 j% ] s6 A7 g. C! G8 U' C
S3=2.20 B3=3.10 F3=2.87 ; \$ w7 N( D4 r$ P
9 A' e& q. H7 B1 c9 S5 j/ V) W$ V7 _1 k% w8 t( a T9 ~5 d. w
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \1 q2 ~5 d4 i2 g2 M( H" s
8 w( d5 ` _0 H- N/ h7 V4 v
: o+ o9 o- K! `1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 / V: m! A4 i' k* O1 L. W
. O" p2 C0 c& E1 J- G2 h; ~6 h/ O1/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
/ x. M* \% |$ ^, K& P! V
' D0 ?; a# @( Q. G) U1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
1 v4 L/ D- u& Q: G+ x9 Y- y- K6 r
4 V4 s/ h7 r, N; P. CS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
. U4 p5 t% Q% A: P
/ E) ~% a3 H* C6 n# n' {6 J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; ! ~; E, s& ~" Y* Z( N2 V- M* {
* H2 N# j: L' y M' ]; d5 w
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s( d- w, u7 v' L
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7 z/ v t; c/ {S3'=40 B3'=29 F3'=31
; S' N: f0 u& x }0 a, S6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
2 Z4 b8 [4 Z5 d/ ~. I' q. a* ^S4'=40 B4'=29 F4'=31
6 N/ M3 U( o% ]: B6 y" Y' M2 }4 T/ O0 g4 ~) \$ J, g, @, h* ^! O( ?! g
(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" Q Q, L% c9 p/ t8 Q3 M% x+ _
* R9 Y/ Q" p9 \
: K" O9 R% c" A1 j$ _; t) x F好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
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[: q) P% h# \. I; QB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 2 M7 [: A7 u: y+ }8 m' w: s
' H$ N7 A% V" s; F% E( ^
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
2 g( B& k- m3 B$ A" [1 _4 D9 j1 p% _1 J6 t Y4 S2 }
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
& |+ @! X" b- m0 s9 E ]' p: I. D7 h. { r |* |4 A' j: H
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
0 {1 n/ J' e! R4 B% W+ D$ n) P# X# M& G8 U: Y X! q4 @9 @9 A+ h
G11=B1*B'=3.15*28.75=90.56
8 S- X- n$ K2 V% |& U' G; Q! {
. T1 ]1 G& ?; O5 w& _G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]% n$ \" G# e% K# S! z P* z4 {( s, `
" g. f! U% f/ q# a2 x8 s
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 f# x; s( ]$ P6 C* |* h W0 f7 S7 s3 A2 @. G$ i
3 k9 n% A" l6 F+ O" B) D p+ 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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