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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑2 ]; d8 {: M2 L( |' X3 ?* ]% @
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( m c3 ]/ S( U) E凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
1 o/ S6 m0 E5 I' c: J4 F( Q8 Y0 m* B P4 T% ]+ G( [, g0 h# T1 g
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)
+ T" \ ], o H2 s1 O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 s H8 S8 l2 Z7 f+ J3 V& D: t
7 i' j# x/ E9 i0 U( `+ L4 h ~& t" ]0 @) w! L( u* H% h8 e l- R- r9 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!
* J. M/ T- a+ \* g( w7 J) L# @5 v7 e6 Z/ _5 C5 S: K8 T8 s' e; e8 B* z) a+ Q
做下算术了: 2 i( y$ \ W: ~: {8 \" `5 s. b) @$ Q. J* n4 k
; ~' L. y! k5 F, M& W+ d
, U/ \/ w5 w) }! Z* @ u(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n9 T& x7 w3 @6 S$ j" B; E2 \6 c
, x" z' l" k% |4 B
(2)立博: 2.10 3.25 3.00 ) C2 {9 a/ }* a2 ~, `9 C7 u
* w. H) P2 {0 `# V6 q(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
3 w% l' ?2 u9 L5 O' J3 k1 |) R- G: U; ^% F
(4)易胜博:2.25 3.10 2.95
0 `' q0 }2 A% Q) P1 j2 U4 L- U+ {+ l. `) m% ~. _/ n* F5 {$ y0 {; Z: E/ w
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
d/ }4 f* ~! x+ Y8 O. K2 _5 F8 F, p$ }' ]( i% c
4 M; x/ i" S& Y' S) B: X% WS1=2.22 B1=3.15 F1=3.01
+ L* g; a7 U- i0 t; Z; p- T0 l. B4 H3 `% h2 w' G7 e1 j$ ]
S2=2.10 B2=3.25 F2=3.00 ( a' J5 q7 U% @
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S3=2.20 B3=3.10 F3=2.87
2 K5 s0 f3 @5 L7 l6 B9 A' e& q. H7 B1 c9 S5 j1 o: q1 ~+ o5 S3 z: w2 @, u2 s2 I, X
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
) G h' }. w2 H/ y8 w( d5 ` _0 H- N/ h7 V4 v
$ t4 C- ~. ~6 u1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 # c' Z8 M3 J6 A& W$ A u! R0 ?
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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; Q% N- z& ~( ]2 i$ I. M2 T6 u$ R
$ m, K& W( D- ~+ l* O# U1/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' x# _9 a+ V! e( K9 V5 J3 `
5 Y1 H2 r- P: E( V6 c% {
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
) f5 D+ P p0 C" S6 T: F( {7 X: G+ x9 Y- y- K6 r
1 Z' m# |5 v- P1 Z2 ?S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T: I: Z6 q& L6 @% k
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类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j' ~3 t. s; d1 Q0 n N
# b T3 ~, B4 n
S1'=41 B1'=29 F1'=30;
4 X R7 O# i, G9 a/ D
2 R A t0 O+ \: O8 X' F, A6 W9 XS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s9 \& T2 O, C( f+ M& ^7 l! E
; m' V% T, u, P% O
4 }# i' p+ J: h2 Y2 pS3'=40 B3'=29 F3'=31
- n1 H$ n; e+ C2 K7 }9 W6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a7 ~0 l5 w; ?# g# H. t# P
S4'=40 B4'=29 F4'=31
; N' @/ x3 ~* v" M! B+ R: B6 y" Y' M2 }4 T/ O0 g4 ~7 f! y& Z" r4 O4 U2 Z" g
(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 f5 f1 g# I6 p! Y+ t
* R9 Y/ Q" p9 \
W7 {# M- w+ l$ ~! G& l# W: p- }好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
" J1 {2 Y' P( u' X9 s) q( ], k9 L T& t3 h5 o% Z8 P% e3 b- _0 P: a
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 . B9 \1 O- P+ D- P. f6 \
/ C0 H. E2 D! f+ Q+ k& y% N
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?! _) E2 s% T5 }, d: E2 q
9 E ]' p: I. D7 h. {' h1 A; P8 }# [6 p8 K
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M( S3 r8 O& v3 A& e8 X2 ?4 P/ q
+ D$ n) P# X# M
1 V/ h- q! T4 vG11=B1*B'=3.15*28.75=90.56
S# Y, G0 _5 {4 r; U/ B3 m7 E. h* `! ?- B9 {
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
# p; J, u# d& r/ _: f" t8 { x/ c* I4 }# H7 r7 X2 `5 r4 D( h
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 \+ \% n7 B3 \. A
6 C* |* h W0 f7 S7 s3 A2 @. G$ i& J% Z% ^2 }' I% q1 {* N3 j; q
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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