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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑$ Q1 d( I. _# G6 U
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
, s% q! w9 d" E) D! q A* R, q2 X; a
I- Q1 o1 u0 U8 g3 x9 ~' U) LG3=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)+ c1 L: o7 y# D# k [4 {, b. ^5 l
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. [
a: F, c2 e' l# |% S) o' ~
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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!
5 u' b2 o1 e+ g9 L& ~" O! ?5 b, R! P7 e6 Z/ _5 C5 S: K8 T8 s
5 |! S3 M" N+ Y0 p做下算术了: 2 i( y$ \ W: ~: {8 \" `
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n6 o( N. k# n# W7 m; K
4 f$ c, a" Q5 Q
(2)立博: 2.10 3.25 3.00 + Z2 R+ Z4 H( N( u) x& Q
- j8 {" r% G0 G- b. i
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
* } b$ f5 }- N4 t
$ n# M. Y) r9 @: c3 f2 i(4)易胜博:2.25 3.10 2.95
5 w+ ~! p4 V$ m2 P& ]2 G4 z- U+ {+ l. `) m% ~. _- m H, |8 ^8 R" j( Y
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
2 s8 |8 y" g6 T5 F8 F, p$ }' ]( i% c3 H: I; w% e- f3 J) i6 c- H
S1=2.22 B1=3.15 F1=3.01
+ j, R2 {% U' K- j! H3 ]/ _7 Q4 `( R: `' C' P
S2=2.10 B2=3.25 F2=3.00
7 g7 E9 V! \) t. @. z% b" w6 @% ^# T/ X4 W2 j% ] s# @3 \* ?- k1 l6 P9 k% t! j: I8 d7 [
S3=2.20 B3=3.10 F3=2.87 0 e% [1 o, }. m! ]7 q- H
9 A' e& q. H7 B1 c9 S5 j
1 e1 ]" B2 b6 t6 ]# G' cS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
, M. _- `; H5 @% q7 a$ f8 w( d5 ` _0 H- N/ h7 V4 v
2 w, A: x: G; A- s( D1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 2 Z0 b* Q$ K. x5 m' p! k! A
5 X0 Z0 h: L4 _" z- W2 M& S0 w1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l7 r6 p- X& l1 m1 O
7 Q6 a, f; p! ~/ R" \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/ }' @( W/ m; A3 G2 S8 t7 ?
( k) o7 v4 s! P5 k; V& Y" n
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 4 D$ O( f: B$ ~& s' `
: G+ x9 Y- y- K6 r5 d, ^; L; e2 l7 R; v0 o
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
3 z) m* w* [) v6 x7 q* H% A" m7 H1 O" k
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j# f% [5 h F9 J
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S1'=41 B1'=29 F1'=30; 9 d* F9 k9 K% w; U! T' K3 D |, @
9 X& V0 S, W9 L2 d6 d, bS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
. u& o3 w2 R3 l( L- c% [5 M) Y4 n/ t; m' V% T, u, P% O6 s. m! s: p8 R d; K/ `
S3'=40 B3'=29 F3'=31 + m! r! s: W5 t' b& D8 L$ y q r
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a4 f/ |! @9 B. L/ C! \
S4'=40 B4'=29 F4'=31 0 _# F- C0 k4 E4 |
: B6 y" Y' M2 }4 T/ O0 g4 ~
2 Q9 A1 `0 J" s" r: J f5 q( V- b3 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
7 z: Z" w) [# _9 w( |9 Z5 g* R9 Y/ Q" p9 \+ Q9 w, U+ ^% j. v
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 % D/ Q2 K6 W! Q( V% H) a& Z
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
# k4 D# v8 P$ y1 W7 d- A: ]2 }/ h
3 q' @1 a$ U( u. R) p+ z) `F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
( ^* d1 C" b: e1 @$ Z) |1 H* n9 g1 j% h6 F; }0 v- W
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
6 @0 K' {. A; q9 ^+ I) `9 E ]' p: I. D7 h. {5 @2 S, _$ {! @; p. X1 h. t8 S
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
8 E4 `* T D* J ]4 J+ D$ n) P# X# M
3 D% m4 R( M+ m% |. n- {G11=B1*B'=3.15*28.75=90.56
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G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
+ N+ n0 {" c' G9 r4 T& E* C2 @' E' }/ H% g A' D7 l: ?
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 \% B3 v& y& t/ e ^) c* b& F
6 C* |* h W0 f7 S7 s3 A2 @. G$ i& r& ~4 H: w; c7 B
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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