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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑. i( H8 |* y( g2 |4 C- N5 ]& [+ f
* f/ a/ y4 p# R- a1 ^9 v! c$ |! e( k4 d( q! U- }( d$ E8 e
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k B# z5 ^9 U% d3 z& X! u
4 S. [5 M. @/ M* r, v1 R$ u
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)- S4 y* m. l8 d( g4 y/ L9 ]
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. [2 |6 e$ @+ ^; u
: E3 w G+ x. N( b. y& t" ]0 @) w! L( u* H% h
' {& z6 H9 |0 f8 Z& g6 w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! / |9 c Z1 @3 e$ X: D- ]% c
7 e6 Z/ _5 C5 S: K8 T8 s
* @1 F* A' }8 ^9 X( k4 F+ v' O$ \做下算术了: 2 i( y$ \ W: ~: {8 \" `
- }3 w u3 f( ~! X l) X; ~' L. y! k5 F, M& W+ d
# }1 s" T. H% I {2 U. o2 t; B(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n" B9 }4 f8 m7 @2 I7 T
# @3 }# p. G& U6 i+ X$ p7 y(2)立博: 2.10 3.25 3.00
2 F: D' ^/ n( k+ f- [# s1 U6 V
& L/ K s2 q/ }' \+ a(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
5 F& G( F+ a+ K5 q0 b; M) M; M2 \ t7 J, [4 w. p/ v7 W
(4)易胜博:2.25 3.10 2.95 6 ^) r% I- M Z5 E1 G
- U+ {+ l. `) m% ~. _2 o) w* W) m! s q
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+ h& E, ]1 z k3 K+ y5 a5 F8 F, p$ }' ]( i% c
$ ]% ~' C% \3 M+ \' I w ~S1=2.22 B1=3.15 F1=3.01 + u/ m( ?, Z# M4 }
0 w) o$ S0 R1 ~5 @. U
S2=2.10 B2=3.25 F2=3.00
0 N( H2 X7 N* `% ^# T/ X4 W2 j% ] s
a% i: y2 q* j. y& kS3=2.20 B3=3.10 F3=2.87
5 a. `- F/ L: ^( V X2 C; Y9 A' e& q. H7 B1 c9 S5 j. d, T$ U8 t) b
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
[3 E+ z# ^: y' W4 t+ B. O: a/ k8 w( d5 ` _0 H- N/ h7 V4 v
6 s) \7 r* X' S+ Z1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 , q& ]# w6 Q. V0 X# \, i8 A( z! c3 l- ]
% ?" X% Q/ e* `! `3 N
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l4 b% E0 s" x4 F1 Z8 m1 u
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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# d' k5 _9 u8 C4 P
/ K# w# |1 N4 L3 d1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
: s) `( k9 i G+ Y5 k8 p: [8 {" {: G+ x9 Y- y- K6 r
1 T: E U9 e9 R/ l$ M! IS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T/ ]" G' L8 c' p% g/ h7 l* Z0 j
/ W9 a6 P+ c( F# f! o* `5 _" B
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j3 H! E- {, m$ q J" E1 A
0 G' Z1 h6 T* u0 ~# GS1'=41 B1'=29 F1'=30;
0 M9 k) X/ `" T* L
5 K) J! ? a2 m! U3 RS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s! g r5 `1 q) e
; m' V% T, u, P% O5 Q. s8 ~3 P5 X, C& n( b
S3'=40 B3'=29 F3'=31 , `2 U5 }( G* H7 _* f2 i! Q
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
6 L$ G) `) L Q# a: vS4'=40 B4'=29 F4'=31 / N" q7 A$ C' y- H5 i
: B6 y" Y' M2 }4 T/ O0 g4 ~
5 j% ?+ S0 k4 q: U 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
4 s0 b5 H$ o8 T$ k- ~: \8 O1 j* R9 Y/ Q" p9 \
( W# f2 s. ^- \! P* r, x0 ~好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ( n3 I: x( G1 K3 w+ D: \
) q( ], k9 L T& t
' n5 B* S1 J# \7 c `B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 4 I# g$ p. d8 k8 m/ ?
2 R9 D" E. m1 X$ X) dF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 7 k }2 |7 v+ D" k, |. w8 ^9 U3 D3 e6 Q
0 `! D4 j- m4 }1 t于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
9 U( d! y5 H2 d& b: j9 E ]' p: I. D7 h. {
% D1 B2 \: w3 FG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
5 l. `, f$ c2 {1 v X, ]. D+ D$ n) P# X# M N- e. t! l* j1 I
G11=B1*B'=3.15*28.75=90.56 9 n- z! Y3 j& \# a3 c6 b- S
3 a( W, h7 v4 r+ N2 u- H1 TG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]$ a+ V* A5 w. \4 ], z
- L( I: x/ b+ b7 w' q: q
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 \* V( Y! S7 g/ x) a
6 C* |* h W0 f7 S7 s3 A2 @. G$ i% x; h- V5 y1 p2 O j% 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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