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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑& T, u8 G( }7 t4 ^
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8 [. k: z& e4 X+ A. ~" v T凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
: S$ q+ `. M0 C" ^/ z6 [! v4 L9 Z. F7 B5 H' U% D8 W2 M
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)
1 ?8 Q+ L2 \# \: e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 g1 E; }0 g5 W7 Q( ?$ M
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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! 0 v/ h8 ?4 u( @; p: O7 @
7 e6 Z/ _5 C5 S: K8 T8 s5 v" W8 ` s7 P4 W5 Y" V' X
做下算术了: 2 i( y$ \ W: ~: {8 \" `% A1 w5 t* s! a# c0 x! I8 N' B0 Q B
; ~' L. y! k5 F, M& W+ d7 |+ P' a) u& F% I. I0 i7 ?, o
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n8 F: l p7 ]) h" |/ K* ?+ p. ~
" u' }' Z0 C! n3 @ O- X
(2)立博: 2.10 3.25 3.00 . J' i; q7 h- E' `# T
$ R/ H8 v2 {6 _; b8 O(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
v7 N: ^) B* Q' T& X7 l- `. n7 e+ y; \2 z6 Z% t% F
(4)易胜博:2.25 3.10 2.95
]1 E! n( X) Z: z7 o+ \1 ^: p- U+ {+ l. `) m% ~. _% n o% G1 J5 m% M
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
4 Y* [8 ?# w" ?1 Z5 F8 F, p$ }' ]( i% c: H6 j1 i) A- o* c
S1=2.22 B1=3.15 F1=3.01
& r# y1 a' l J+ N; s% z2 g0 [( W' l% G3 O0 j
S2=2.10 B2=3.25 F2=3.00 3 q/ O, g- J9 d$ q/ K
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S3=2.20 B3=3.10 F3=2.87
) `! m2 n* @) L" I" @' E9 A' e& q. H7 B1 c9 S5 j
% z) C$ m& O, |- q) z9 A; I, z+ @S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
6 w. O$ R- m; v1 J+ K8 w( d5 ` _0 H- N/ h7 V4 v# _: X! j f: X& t
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
0 ~) G! K0 j" C: Q/ Q7 ?0 m8 z( C1 Z9 J' g! X7 U( _9 [0 m# N5 ^5 ~
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l7 b: G+ M, N) L2 B( `
% m. @' Y4 d) D; A5 c+ h1/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
5 w6 Z+ J" F* B: H6 {4 H" p$ c0 j9 X' l$ o9 @! e. B; e
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 . `$ W4 P8 W0 x* g h
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S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T* R: g8 g/ a; x3 |
5 m/ z' Y% v3 J. Y1 G( z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; % T2 U3 y0 n5 J* V7 p4 ?$ W
6 z2 y; ] o) N# ?1 W9 k5 {8 G
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
/ P" O0 |' N9 N, ~1 C3 u; m' V% T, u, P% O4 f3 Z' \1 X) g: k
S3'=40 B3'=29 F3'=31 % G" |2 ^3 o7 R. D
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
5 s$ t6 \: Z4 l4 K+ N/ P) D: ~/ gS4'=40 B4'=29 F4'=31
, Z, z4 W$ m' A0 v+ I: B6 y" Y' M2 }4 T/ O0 g4 ~- u4 {4 w3 ?4 V8 [
(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
0 ]7 W; x7 T; Y( }8 y* R9 Y/ Q" p9 \
" _' q0 @" U' a+ s$ g6 H! g好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ( y X# @6 G) F# b; p/ m
) q( ], k9 L T& t* a# ~1 |( }+ ]; B
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
# V$ D' ~2 ?/ }( B/ N
0 d; [$ }: @6 @* BF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 8 Z9 J! L# v. a+ y0 a. t
8 `) i9 S! A& z) J# d I
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?/ Q: K% V* Y. h; J: E8 f0 V
9 E ]' p: I. D7 h. {
1 E" C! x1 H9 A. ZG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M4 p2 N- [/ R2 {6 D# a: ]! n! G, j
+ D$ n) P# X# M
4 v* y% Z* S1 w$ L( v& V" }G11=B1*B'=3.15*28.75=90.56 3 K% W( w/ o' ~1 s" x
% K8 ?( p! V' o* p5 x( ~3 |/ m
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
; M0 V. u8 m9 F; W3 J- n% ]) D" I& O8 |* 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 \
) i9 R2 d3 A* b6 C* |* h W0 f7 S7 s3 A2 @. G$ i
; H) |3 s, ^6 t0 h& w6 | i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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