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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
& W; r! ~! R* K/ Z w* f/ a/ y4 p# R- a1 ^9 v! c% T8 H: ^; m8 V) E, q. X D2 p
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
* n) ^* A; f: k0 f
* ]! i. }, {9 s4 v. W) {; qG3=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)
3 L/ b- e! l- w& j" L# v u; D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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* W* n0 R! T% D+ ^0 P& t" ]0 @) w! L( u* H% h
$ S5 ?; r! x6 y g# H1 H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! : e% i( o6 h4 [) V. r c- ^5 T
7 e6 Z/ _5 C5 S: K8 T8 s
* d8 A! }. y; f3 Z/ \做下算术了: 2 i( y$ \ W: ~: {8 \" `
$ ~% {. j% m" \' K3 I; ~' L. y! k5 F, M& W+ d
' f1 }4 o$ P, O. n8 K m(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n% g, z8 U5 S# h, g
* k* u6 y/ e* B p1 e! l(2)立博: 2.10 3.25 3.00
5 @7 P8 n+ |* L
( b1 G" K$ q1 P# w' Y(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
( F/ j# }7 i- E0 j- O6 v: g& r
4 Q5 p+ `! u% O% l1 m' K(4)易胜博:2.25 3.10 2.95 ! Z3 I4 F, ]- w% l: ]% b0 V) l
- U+ {+ l. `) m% ~. _% c3 m8 _" B: 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 ; d4 D6 c m- @0 r, q
5 F8 F, p$ }' ]( i% c
- W% Z. Y, Y+ c: a& X2 d h, x9 OS1=2.22 B1=3.15 F1=3.01
* e" t* q5 S8 Y$ O% A# [/ X% ^% \4 d, O
S2=2.10 B2=3.25 F2=3.00 % b& _2 b+ o$ ?+ K# `
% ^# T/ X4 W2 j% ] s
! t5 w4 D! S4 Z' a1 x4 U5 Z9 x1 HS3=2.20 B3=3.10 F3=2.87 8 L y- e" o6 M
9 A' e& q. H7 B1 c9 S5 j- Q5 A% ?* \5 D" L9 H8 ?3 r
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \$ M; T: i7 O6 x( A$ i7 P! w
8 w( d5 ` _0 H- N/ h7 V4 v
9 a6 t9 P9 H# \2 V6 n, l- U. R% k1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 5 f( H5 A# w/ h9 V6 Q6 r' p% E* a3 |
7 T( Z1 O+ t, c1 m% v
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# B3 C3 E- } v% ?4 j* r2 W
8 F8 ?. u6 Y5 S& z& X1/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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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 % h# O4 K6 x, j: [ k
: G+ x9 Y- y- K6 r
! a- Y6 H# K( g1 n$ o8 `S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
" A! \) f4 e2 V2 d: D: }* o9 U+ \- z1 K. Z
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
b) _: E; y( g) |" S: B, O; b' t
* _8 n8 C$ N1 Q5 hS1'=41 B1'=29 F1'=30; 4 i/ T+ O* W, _+ a4 F& U
1 F5 _8 z4 e% s& N' b
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s, r' T$ H! i4 ?! V# e
; m' V% T, u, P% O
. @9 c& L$ p; {' E& u5 oS3'=40 B3'=29 F3'=31 # A; D4 j- p3 b
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a3 m. \! s R. R$ X
S4'=40 B4'=29 F4'=31
8 D/ B% P+ h8 b2 l! O: B6 y" Y' M2 }4 T/ O0 g4 ~
5 o9 [ N3 y5 w6 g$ o3 d. F4 \# Y(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( [. o3 o' A: E4 Q8 {. P
* R9 Y/ Q" p9 \! ?7 S9 s0 s+ @% Y: B; ^) s
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 3 T. s$ ]1 D6 X: }, d; q6 K7 _% @5 ]5 @
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
: @8 A- B: d( h- }
. U& D/ K S; Q/ y, P( k; RF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
- y# x7 k' H: _/ h2 o: _& j8 w8 S, `% J" j
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
# J0 O) W7 q4 @* N9 E ]' p: I. D7 h. {
( l1 i3 V4 C3 ~+ [( _# \. fG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
; b2 x# S% x# ^; l+ ], m+ D$ n) P# X# M
: m }# C6 @3 C$ P! h2 m( a. vG11=B1*B'=3.15*28.75=90.56 & t% R k9 X* ?* n4 |' e
) u; L( S+ m4 K B u+ W: `2 DG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]. l- ^1 J7 h% C1 p- j
1 N+ ]# A/ n3 x C
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 \" r) F7 q* \" p: G5 P
6 C* |* h W0 f7 S7 s3 A2 @. G$ i) T! A" Y' U0 I5 p' B7 ^2 t. | g( ?
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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