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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
9 B3 n% ^: R$ ^; P+ N- ]* f/ a/ y4 p# R- a1 ^9 v! c1 Y# a+ {" l/ R$ X7 \! |+ E
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k2 E/ g: q' c: ]# d6 D# U
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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)
' ]' h7 L1 f- 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. [
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& t" ]0 @) w! L( u* H% h
! x6 |$ P2 u$ o4 M' }; ], E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! $ M( d7 g, a# t: f6 v
7 e6 Z/ _5 C5 S: K8 T8 s
7 D( W1 ?( M2 K! @做下算术了: 2 i( y$ \ W: ~: {8 \" `
8 p+ ]" z2 u4 f6 k3 c9 x; ~' L. y! k5 F, M& W+ d! E7 i* d4 {' `) o9 P' j4 a
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n4 N p6 n8 p3 ^( r0 w1 ^0 ~
% h5 {0 Y" H9 R
(2)立博: 2.10 3.25 3.00 ) _* S6 Y/ U3 `
5 ` J5 b. E3 h: S/ E
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t* X3 ^7 d. P( I6 z! N5 [5 r
7 M) D' b3 F0 N5 l1 x) r(4)易胜博:2.25 3.10 2.95 % R- Q* N7 s8 F0 Q5 y) q9 e
- U+ {+ l. `) m% ~. _
: B- L) |3 y8 S, c$ }7 U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 ) C( P( y" X' f9 H3 I0 {
5 F8 F, p$ }' ]( i% c" Y0 k, |' q3 n
S1=2.22 B1=3.15 F1=3.01
1 J' A7 H6 t2 T6 D% @; R0 j+ ~# s) F+ P# r
S2=2.10 B2=3.25 F2=3.00
]0 N/ Q: E) X$ u% ^# T/ X4 W2 j% ] s5 w( k! }9 C! N; |
S3=2.20 B3=3.10 F3=2.87 0 K/ H! j/ x7 G+ H$ c# p1 ]* h
9 A' e& q. H7 B1 c9 S5 j
1 v4 U" N' c0 d2 l$ a# cS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
$ N7 @# `% G$ V, o9 l- }# i8 c8 w( d5 ` _0 H- N/ h7 V4 v
! @+ ^7 B! M$ A8 k* Y0 U1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 7 q7 ?3 H! m8 v5 P! s' c! {% C( g9 z1 b$ v
5 r" V) C- e& h8 @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) W2 ]% C: L1 G6 f& t5 g
* |/ B8 w6 n7 I+ |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
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7 _) U& x( H0 D8 p- `8 R" }+ }/ U1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
1 ^2 n* D) q. i, s. O2 I: G+ x9 Y- y- K6 r
2 b2 M7 u% v0 S& ES1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T* u+ c+ X3 X, ]0 b0 Y( |; {, l
+ G% t" b2 C4 X9 S, i/ h& ^
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j" P- y$ v9 ?6 P& h* P. C0 _
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S1'=41 B1'=29 F1'=30; + Q* L6 ]! @- X! V$ L3 v
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S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
E) t! N, N- [# Q; m' V% T, u, P% O
' K4 o) Q3 ]# c) x2 p. Q) V6 NS3'=40 B3'=29 F3'=31 % `5 d% h( p; h( {+ p
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a) d! a n# k* m5 b E8 ]% g1 \
S4'=40 B4'=29 F4'=31
4 [. ]! X0 n+ b1 Z2 y2 X: B6 y" Y' M2 }4 T/ O0 g4 ~
7 P. M: Z: H4 }5 Q/ r) P& y/ \4 ](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+ {4 k3 M* C3 Z9 {" T) ]
* R9 Y/ Q" p9 \
$ c' {, n% p b+ q7 z, D# Z好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 % S# k, F. h$ F3 ~; B7 y
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 $ g0 b4 n% z: w" o7 l: P
6 |5 p8 }) T$ P3 E
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 " f5 j, d G1 E" L7 u
2 h% Y6 {" c4 E9 K于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?# B9 [# Y& [; F: t: O
9 E ]' p: I. D7 h. {
. i+ x( {# L: cG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
* z3 P1 m6 f$ ]+ D$ n) P# X# M* J( K4 @% s2 u4 g( D1 O( x/ g4 ^ [
G11=B1*B'=3.15*28.75=90.56 / X, r6 L; \( e+ K8 {+ A
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G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
3 @8 E( s z) ~5 l& N& w( b/ i0 a+ v. W! M1 w4 i, w
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 \
7 a3 K- I# o2 I6 C* |* h W0 f7 S7 s3 A2 @. G$ i, ?6 z& W4 [ x: B4 I4 N
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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