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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
2 X9 o: i* O( n8 K/ u# p* f/ a/ y4 p# R- a1 ^9 v! c, P' o5 h. u; n+ k$ P/ F; g/ }$ `
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k4 ]0 N( ~ \2 D u+ e* Z, z
0 N' A% D$ X5 F4 V' @" IG3=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)
- ]. U' I! E' ~- i. P, 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. [% G4 T2 ~. `( `3 Z! b) j
7 a) J2 L' B. J6 X( f
& t" ]0 @) w! L( u* H% h$ p$ [+ d) K h) R" `) F' E9 ^$ j
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! " @4 |& y0 P) ~3 R9 W2 n
7 e6 Z/ _5 C5 S: K8 T8 s9 K6 f* \8 }( U; {
做下算术了: 2 i( y$ \ W: ~: {8 \" `( n8 v+ S/ x: L& R+ w
; ~' L. y! k5 F, M& W+ d/ W. `9 A$ Q1 [( z; o
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n& J. b# U" n. h8 m! ^+ ?8 i
" a; @: Q0 A6 E g5 n
(2)立博: 2.10 3.25 3.00 . U4 F" y% ]( C
) @) s8 v7 R) C4 }
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t& i' A) R' o g+ _, q- f
, @3 ~% W) Q ~. C5 p(4)易胜博:2.25 3.10 2.95 & o J0 k' P# D" C
- U+ {+ l. `) m% ~. _
# H/ p) E, s2 i! k; m+ A; `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
" x) U }# u7 f) V$ t5 F8 F, p$ }' ]( i% c) ^* J( ?, z$ y& ?: T
S1=2.22 B1=3.15 F1=3.01 2 z) M7 I: w. B" q0 Y# c1 ] e
9 K/ f9 X8 r" ~ z8 X" P: |% D* iS2=2.10 B2=3.25 F2=3.00 0 h! _3 n' G' ~) ?" Y* ]$ n: D* v
% ^# T/ X4 W2 j% ] s4 x+ I$ q6 w7 t0 g- K# {
S3=2.20 B3=3.10 F3=2.87
+ v) f! a- t( V. s' z9 A' e& q. H7 B1 c9 S5 j
, @4 k- M/ N% a8 n Z+ \4 W" tS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
0 [& k! L; x9 |2 l6 v! D8 w( d5 ` _0 H- N/ h7 V4 v
: @% q4 a8 W& k" @* d: P7 a+ e$ ]1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
8 ]& A& v6 [, D% J! U4 {& r" W( F. C$ q" A/ O& b
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
! e0 I! x" d* Y( c, B
: b+ `- h- i+ e; L8 U3 B1/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
! N- U* y6 l9 }& n7 ]7 ^5 S; X; i0 G2 X5 U* f6 p( K1 e8 e
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
. k8 ]$ [( N! v$ t/ a# {% w: G+ x9 Y- y- K6 r& A" C9 A# n; t, R7 K
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T9 \6 X# T( u8 d# H9 s9 {8 ~
4 m" i l. z6 {类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
1 A+ L& q) t1 H7 R" R; G8 i/ S$ K1 J5 ~( m
S1'=41 B1'=29 F1'=30; $ K D! Z# M$ s$ q2 v
, a- `9 o) Q, U- HS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s9 H4 b2 S- d* M( G+ l, Q$ Z; W
; m' V% T, u, P% O4 U c! q8 ?! M8 I/ ? X2 {
S3'=40 B3'=29 F3'=31 2 r& [2 y( [8 y& R$ ^1 b. l- c
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a5 e/ I: J! s" r( d$ w2 f
S4'=40 B4'=29 F4'=31 ' c0 r- J2 q1 l
: B6 y" Y' M2 }4 T/ O0 g4 ~
% f; P& o7 I% z$ { b. I! O(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
& j3 w/ e1 G5 ?& Z& R1 D* R9 Y/ Q" p9 \
( \% Q. V' j7 Z+ X4 W5 r好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 % F7 n1 j- C- h# F
) q( ], k9 L T& t, V3 J; w) u7 g2 F* v2 O
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
% c3 j$ w& ?: M
* s; V8 V. B/ a3 k- nF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
; K5 p0 }# A* S* h6 T; g/ {; _# X! l# C; [4 z# s
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?2 c7 W! M6 ^) F4 Y
9 E ]' p: I. D7 h. {
8 s! p' J% b* x+ h* {6 j f# D! rG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
" ?) E6 u# I7 O& P9 N$ G3 D+ D$ n) P# X# M
! J! V1 g& z- P* o1 rG11=B1*B'=3.15*28.75=90.56
% C+ S% U# x& l4 R2 K4 H( k( Y; A& w9 ^
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
9 j. q7 k( j0 W" e- R+ t
) \" ]# q+ |) s" u7 ^9 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 \ }6 ]: N: z& p8 w$ q6 d3 c! V* t M: D
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
. s- z6 v( s# ^: i% c1 E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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