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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑8 e$ B5 g% J4 P0 n4 j e. U
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$ e/ P5 o5 y4 }" y& }. [凯利指数的计算方法: ( O1 m2 a L3 d; F& D k7 G4 n$ P$ o! d0 T5 V4 P
, e$ k, @1 d, I4 F5 K4 v! Z4 KG3=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 f) z6 y( M$ b
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. [
5 M3 V! I8 t" ]+ z1 p' |
& v: C: Y' t7 F0 A& u- T1 w& t" ]0 @) w! L( u* H% h& M7 V$ M/ g8 z0 q h' p D
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!
! a0 P! A1 w+ R/ b. |7 e6 Z/ _5 C5 S: K8 T8 s2 m4 ?5 I3 u+ G
做下算术了: 2 i( y$ \ W: ~: {8 \" `
" D; ?4 H' S' f; ~' L. y! k5 F, M& W+ d+ b/ X; J$ f/ j0 f5 \
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n" P. [2 b$ p+ G' X& A6 n* |% e
# K% Y, D* ~2 K9 t6 k3 h3 d- Z( A(2)立博: 2.10 3.25 3.00 2 r4 D. y3 ^& |' L0 W- M6 [0 L
* s: N% q1 O- q' y(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
! s3 m3 H* a0 A. X% F# Y. j; w5 A/ W$ v/ Y
(4)易胜博:2.25 3.10 2.95 ( w) g. l) I$ Q( w1 b- [8 m
- U+ {+ l. `) m% ~. _
- R* O* {/ \. q- t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 $ ?* w) L& }, Q
5 F8 F, p$ }' ]( i% c$ w5 P# I @6 d# t( Z) W
S1=2.22 B1=3.15 F1=3.01
0 \- f7 q. D5 S2 i' K) G8 M& T, z8 R" h; O% y) R% ~
S2=2.10 B2=3.25 F2=3.00 / u& @! F( s2 k4 u6 T: b
% ^# T/ X4 W2 j% ] s
' N$ _0 ^- V' {3 Z; W% h3 q6 tS3=2.20 B3=3.10 F3=2.87 5 J2 P b' r8 ~5 [* p; F- y
9 A' e& q. H7 B1 c9 S5 j: M1 h% ?/ \7 Q: o/ @
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
$ B6 W0 r$ R' \8 p) }6 C8 w( d5 ` _0 H- N/ h7 V4 v
3 \1 M5 t0 [5 v: J# D1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 6 H/ b5 e5 c3 X# q3 w3 W, N& p
' ?7 z4 T3 |. F4 W, B- N1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
9 D) p1 F2 n3 e" R, Z6 }
I! [ c2 q6 [( m7 V! c5 o1/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
% n6 W* ]3 ?, I/ C: G+ x9 Y- y- K6 r! f# z9 K" T, Z8 j* j! V
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
4 b: ^7 Y7 F, e5 |3 A; Z( a" G! L- N" S3 J# W5 q/ c' d' R
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;
n/ M! C- @7 Q5 ]7 }- {! P4 R! S1 K" M( O7 m6 C0 B
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
8 D [3 M& W0 r$ o# s% k- q" g; m' V% T, u, P% O/ O. _) ]7 F, b N
S3'=40 B3'=29 F3'=31 6 n6 `/ ]$ {5 H+ x& }; i- t
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
' Y/ p8 u+ H9 v9 cS4'=40 B4'=29 F4'=31 & Y. M3 ^) K( r# V! Q6 K
: B6 y" Y' M2 }4 T/ O0 g4 ~
7 L; R; h* r0 e; Y( L(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
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
1 V# [% \) }' g# s+ h) q( ], k9 L T& t& n: j3 i J4 I* D: C! m
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 0 v/ _& p8 Z$ X7 c+ u+ a7 }+ N
8 H+ J: H+ S: w' @) |
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
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于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
7 p& V. Q) \$ H- e" y. V2 T. L: S9 E ]' p: I. D7 h. {
j' C, K0 {) \ Q/ K3 \ m. R4 UG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M- N" F5 i1 E p
+ D$ n) P# X# M
" e8 G" D x+ `( R* u, `9 ?G11=B1*B'=3.15*28.75=90.56
# i/ q2 V4 X# `' B# f& F& N7 U& H, v
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
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( b% U. p, Z3 S9 T3 p* l. a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 \: H) R r- P' I- x
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
: ]: v8 S# X+ K' y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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