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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑: M* ~/ j; w7 \1 g0 Q: W
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k- A% o1 G' G. s" d8 Y2 A6 {
0 I6 ^& c! l D7 t6 {/ i) ^( iG3=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)
/ [' S8 z l) I( S2 m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. [: G" a& e+ X' H3 T+ v; h
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' {( f* I6 w& G% | g3 A" Z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!
# H7 p9 k' A9 E, g/ Y7 e6 Z/ _5 C5 S: K8 T8 s8 r0 H/ E( p/ Q# U' N
做下算术了: 2 i( y$ \ W: ~: {8 \" `
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, s- _5 }( [ a0 P/ W9 J(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
4 q. w) l: ~- T7 A1 \' B2 @8 r- y
" H) }7 I' V5 v- M7 X(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
4 k( E! z& S4 C3 w' X) m6 D0 P0 E8 a: h
(4)易胜博:2.25 3.10 2.95 5 m( J% H6 D- Z1 u( E0 T7 v
- U+ {+ l. `) m% ~. _1 d R% H4 m W" R
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 ( P8 C" ]6 N. p R; Q
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S1=2.22 B1=3.15 F1=3.01 ) L' K! [. O" F- R. _
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S2=2.10 B2=3.25 F2=3.00
: i% M: ~7 i3 I# p; ]8 f; C( T% ^# T/ X4 W2 j% ] s
: \* J5 |+ P9 v D/ n/ QS3=2.20 B3=3.10 F3=2.87 . ]; f9 {) W" o( g8 }; Y
9 A' e& q. H7 B1 c9 S5 j1 t8 N5 Z! K: x
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \* b1 J# |% J& r# `
8 w( d5 ` _0 H- N/ h7 V4 v
6 l( ^" V, a% y6 y$ n/ T3 F/ g1/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% l3 c9 e9 G1 C3 m( P" t% U6 R
7 u* ^9 \& _6 U1/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& `4 M i% l4 U( s: C
2 j( W" {+ n- B6 _' O) d1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
( F, z# j/ s6 _7 W2 ^: G+ x9 Y- y- K6 r
9 i% K( ` a3 N* NS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T3 R6 A: r1 }( n/ o. _- X( b
# q. T H: k4 y& g# e类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j; d, w A3 C: `- V a6 Q7 v6 S$ a1 K
2 d# I1 s9 i# e% w0 Y1 O5 u. JS1'=41 B1'=29 F1'=30; 5 p) @! m$ o f7 m9 a/ j
0 @9 ^( \+ C+ t' b
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s f( n; q! t: `/ T3 d: t& B
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S3'=40 B3'=29 F3'=31
& K2 D# [5 w- c3 j. e6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a2 J, T4 I0 W) C" Y/ j5 m6 }
S4'=40 B4'=29 F4'=31
4 K0 Z( e# k. L5 w2 p- o8 b. Q' K: B6 y" Y' M2 }4 T/ O0 g4 ~: F2 d: ]9 H; Y/ l6 q; S& 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
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7 [2 \6 Q4 h" |/ Z: C2 F. k好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
4 ? S1 S$ p. x+ z$ Z1 v) q( ], k9 L T& t
; C4 ^$ \, o/ gB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 ' \# z. f7 U) w8 ~
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
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H( W" ~# G- j, K% E2 p: ]$ Y \于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
1 a) w) E' Y+ W" \0 v6 h! H& j7 e5 Q8 D9 E ]' p: I. D7 h. {
/ R2 A; f+ Z3 N/ @G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
/ T9 F3 @, q/ n' B3 H+ D$ n) P# X# M) E7 {; c9 Y' X# O/ h/ {9 ] f4 z; E
G11=B1*B'=3.15*28.75=90.56
( A$ i. R6 m1 s" V7 m
2 q9 f2 b/ ]% k4 g, T9 P4 _G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]3 G9 n& _& I8 h* ?5 w
7 {9 i! ^" e0 {8 T3 g/ T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 \
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0 I6 j8 P8 }7 X( Z( u8 c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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