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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
) w* W8 Q7 F3 `. h8 j: I6 T8 G# N* f/ a/ y4 p# R- a1 ^9 v! c" e6 q! v" _: _; q8 r3 A
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k( x% e4 l q0 x8 K5 F
' z3 y; x. O* G, wG3=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)
5 @4 J: v% g8 h/ ]0 H. i! N& V, ^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. [
6 G" v. v- W$ S8 ~9 k: o3 b: b' I2 y; h; B& m, G4 I* N# ?
& t" ]0 @) w! L( u* H% h
1 k p/ D$ S+ w" T9 X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!
( v5 A4 m( u/ W9 w7 e6 Z/ _5 C5 S: K8 T8 s% m" e5 ^( u) g
做下算术了: 2 i( y$ \ W: ~: {8 \" `7 J" t* N- R4 X* L% S
; ~' L. y! k5 F, M& W+ d
n8 {8 c, E& c+ U, L) T7 Y- ^(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
& F# ^& f6 s+ s% E8 E1 c& ]; ?" l- J% @ c1 b( D7 g5 e7 s
(2)立博: 2.10 3.25 3.00 # Q" V& p5 W9 ?2 q. X6 j
" w7 }1 R# y8 h1 r& C(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
* ?: [; P4 T# x+ K4 V& K
& X" w; c2 N' k8 A; K(4)易胜博:2.25 3.10 2.95 ) y- [" E* F$ W5 p! c
- U+ {+ l. `) m% ~. _; h' ]3 C- n# R, M8 I) d
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 ( e7 n0 C1 ~* U2 Z
5 F8 F, p$ }' ]( i% c
0 T8 Q- W* J( A/ U; JS1=2.22 B1=3.15 F1=3.01 6 S2 `* R4 ]* n8 C& W$ u
' Q4 p: g" n1 g" l0 O; f- bS2=2.10 B2=3.25 F2=3.00 ) j: O6 A8 N; A9 [3 M) p
% ^# T/ X4 W2 j% ] s
* A1 S& r# v4 c9 Z/ i7 t+ G MS3=2.20 B3=3.10 F3=2.87 ' Y8 X- q& o9 D
9 A' e& q. H7 B1 c9 S5 j
; q! x1 F( a: L, QS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
: a: `3 I6 G6 k' |# j8 w( d5 ` _0 H- N/ h7 V4 v
; f! m% ]3 |$ f1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 / e% m1 a" _( ]6 j, C8 A% A6 k
/ s L+ b- \9 }' u' h
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l8 B! ]& K3 y% L) ?7 t6 z2 c
9 M6 y7 z0 S8 [; k1/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
% B3 f* t& f" q1 H( B2 h5 K& {$ V0 b: e4 o3 O/ F k
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
0 Z; k7 c: u9 W( A: G+ x9 Y- y- K6 r
2 W9 d$ j, Y: `8 t" P/ t9 r, sS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
: _2 P. W9 y1 ? i
' s# L) Y1 a# x3 q$ E w类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
# i' S5 V3 V: U8 b8 Q6 l4 m* N( s; [9 |% @! ~9 q
S1'=41 B1'=29 F1'=30; 3 U: s# w8 j- q: b
. m8 q- S* X8 o) aS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
7 Q6 d$ J) Y7 g( x; m' V% T, u, P% O
5 a: O; i; v9 E8 w6 |S3'=40 B3'=29 F3'=31
0 B9 e( i$ {, H+ m: y6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
) f5 s; X- }6 `! hS4'=40 B4'=29 F4'=31
! @8 d; O- J6 c8 Q: B6 y" Y' M2 }4 T/ O0 g4 ~8 r; \3 J% d' Q8 O( v
(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% X9 J# I; c& h4 v
* R9 Y/ Q" p9 \
& k) x6 F6 X% p! ?好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ; R+ d4 {* j+ N2 y1 f
) q( ], k9 L T& t! a# N; ^0 p+ Y8 W$ F
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
' ^; M1 R7 m8 F- n
/ k( |( l, k4 u6 k/ h3 vF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
3 _5 [# a! o. K @. f1 K2 e \4 b- e' s, w2 b, U$ u y H
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
* h, M& A. \, @7 f- V- V8 t9 E ]' p: I. D7 h. {2 O% R, k# ^8 y0 {6 p" |3 M
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
+ x% \0 }0 ^# x" w3 ~+ Z5 m+ D$ n) P# X# M7 n/ U. w3 b0 }
G11=B1*B'=3.15*28.75=90.56
3 k# E. W3 D7 f# H
1 D) e3 z8 q' c5 uG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]4 d( G( r" Y6 c
! m5 F; O/ m+ Y9 j' W, r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 \. I/ s( \+ N; \: l ^/ U$ B0 \" }2 o
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
' e1 @! S, S0 i) C2 N0 m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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