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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑1 L+ h: c% m8 M2 I& H3 ]3 i
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
9 k7 F% n4 ^4 L# U4 D# @( T0 J) h0 D' I/ G- w
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)& _1 j7 U6 D0 j
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. [# E1 v% n! J/ j5 r, k! p/ H4 \
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! ~1 r/ T' }( Y2 F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! 4 }! E+ ]( S/ H: ]3 v _# \. J
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做下算术了: 2 i( y$ \ W: ~: {8 \" `
6 \6 M0 u$ ~# S( q/ R; ~' L. y! k5 F, M& W+ d
* E) P( |8 W5 b, V(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
; R6 r' p/ n& H9 v6 h j" @. u/ s# e9 C2 D9 d; ~7 S" b
(2)立博: 2.10 3.25 3.00
. J: g/ e/ E* x1 {' S) |0 j$ y5 X5 Z9 I+ s% Z _
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
" l* k' `0 S# w! c9 D3 m6 V+ ~5 x; i1 x3 G6 f) o
(4)易胜博:2.25 3.10 2.95 # `: L5 T; I4 K4 j" I/ z
- U+ {+ l. `) m% ~. _8 { Y" P0 }& T+ p
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 % ^. F2 Q( n; `7 R" S
5 F8 F, p$ }' ]( i% c
/ B7 B2 E; ]! c5 p5 PS1=2.22 B1=3.15 F1=3.01 ' b& d( G8 j9 l [: N q
7 X5 P0 c8 S$ V( a
S2=2.10 B2=3.25 F2=3.00
; i9 \/ Y1 j% U" \% ^# T/ X4 W2 j% ] s( x& m& I2 [# B" I# ^
S3=2.20 B3=3.10 F3=2.87 - s% }5 R# O `' V! K, s4 v1 {
9 A' e& q. H7 B1 c9 S5 j
2 y& g1 h7 _. e9 u2 t, Z o. iS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \5 x% u. c6 I- s, T
8 w( d5 ` _0 H- N/ h7 V4 v% G7 L2 a$ E; R) [
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 3 G) x8 X7 A% g: Q
6 h' D+ ?7 a+ F
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
7 r, x. b1 d/ K, Z: p, J0 i8 X& E# ], @ i: q6 v1 ? C6 h: \" r# X
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
% i8 @# |- q' B& d
; J; V% ^1 l' {. C7 c- T1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
- i( v, S+ t; T* E$ Q9 Z: G+ x9 Y- y- K6 r
4 r4 _) Q7 W& V( d: Q: KS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T$ F* ^: r' N1 l' E! u, n
. a+ H& a/ t6 N. l' ]
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;
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! h9 H+ g* m- B" ]* dS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s9 t- l. w" y7 R" }2 C1 H
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( s" L2 J- _0 z- B+ j1 x" lS3'=40 B3'=29 F3'=31 2 _2 l% r; K0 P' r( j% J
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! o( e# h7 r4 s, s7 B) sS4'=40 B4'=29 F4'=31
2 v( v0 W8 ~8 w$ I5 R2 `$ n. @: B6 y" Y' M2 }4 T/ O0 g4 ~3 T, G u4 C7 a1 r
(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" ]1 j1 u5 Y4 H" ^- j
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, K' u! e5 N1 T& V- [& C7 K$ x好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
4 t1 z8 c, \& j6 C) q( ], k9 L T& t
, j; E- m) o$ x' f/ c: F+ Q& X1 \B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 * Y `1 G8 p2 D. P* k2 I
( f) c6 }- p0 @ q% n1 \; n, D' o$ r5 iF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
/ c' W0 t+ \! q0 l# \) C5 v# M& l$ X" ^
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?! U0 C9 [9 I2 Z1 ]9 t
9 E ]' p: I. D7 h. { e c# e( y. {. M5 u7 F
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M: \& \6 ]8 p4 L0 `3 J
+ D$ n) P# X# M' A) u. l0 R# } w. O7 z1 |
G11=B1*B'=3.15*28.75=90.56
8 S0 B: B; H6 S
- h" Q+ e4 D7 }; |G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
/ I3 G- \9 D) c8 l" U* x C* x* m. 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 \
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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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