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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
D" [) O, J' ~9 x* f/ a/ y4 p# R- a1 ^9 v! c
0 W) i7 J; u1 m" Z: L凯利指数的计算方法: ( O1 m2 a L3 d; F& D k' N! c2 S. I$ w9 F$ ]2 _: u5 E
) p% ]# n! y4 d+ v$ ^' X7 f* g3 gG3=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)& y& |8 C1 h' e1 M% } [7 ^1 P
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. [
9 ~4 P/ p9 w( ~2 x, `" n2 _( W. r& k3 N+ D
& t" ]0 @) w! L( u* H% h
2 x9 a: r, @/ c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! ; I i6 e: P3 B" R4 C% w2 H
7 e6 Z/ _5 C5 S: K8 T8 s6 i4 [4 z4 W B
做下算术了: 2 i( y$ \ W: ~: {8 \" `0 j. k: B( v* `
; ~' L. y! k5 F, M& W+ d
; x0 C$ S: J& p( a( |7 E(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n9 x! p' t' h7 m, h8 A7 F
4 o; P- q! K. T% y
(2)立博: 2.10 3.25 3.00
5 g9 P* R r( ?! ]
6 J) x: G3 j; n! v(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
! Z' J6 u/ a: R2 F5 o0 o- b6 e: Q6 I1 C& i5 I0 {# U
(4)易胜博:2.25 3.10 2.95
8 h; K+ [/ G' I2 ^( `/ d& U0 S9 L2 Z" V- U+ {+ l. `) m% ~. _
X6 F" H, m0 |( E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
. n: X5 y$ y* U- \! Y5 F8 F, p$ }' ]( i% c5 z# g: H- s9 X$ @
S1=2.22 B1=3.15 F1=3.01
' T4 V3 A/ }$ t D, y2 e7 j( \# s- |4 H3 C9 k% M
S2=2.10 B2=3.25 F2=3.00
2 z/ ?6 B1 T) P7 a1 P' L; M! [% ^# T/ X4 W2 j% ] s
# j* C- b6 R/ S+ a- X- ]& Y# z3 \S3=2.20 B3=3.10 F3=2.87
& V$ w( S% q [0 j9 A' e& q. H7 B1 c9 S5 j
- l; j0 M0 |0 ^! }+ n. TS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
; R# F: C6 J) @7 T- ^9 @8 w( d5 ` _0 H- N/ h7 V4 v! D1 l9 u7 m4 ^/ X% C
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
. x, d- H6 U/ b4 u; h$ X/ z j7 [6 z8 [4 j4 `& 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
* p3 {1 W+ o9 b5 e
7 j8 `) J% A5 d3 ^/ Y' r( s1/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
$ }4 K3 w) j" A U" I D
w+ r5 o. t. s, r8 _1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
- H% H2 A( V1 R$ ~* N: G+ x9 Y- y- K6 r
9 j- k7 C; i7 S& x0 y' D" jS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
1 f/ S$ h! Y2 E; ^' c8 T2 p
p2 j \6 e* h+ f类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j9 Q: X i' ?* r& s, [1 t/ O9 t& a
\& w' {/ C" \3 i& }( l* N
S1'=41 B1'=29 F1'=30; & Z) _) O! E6 ?1 ^2 P/ W
+ D4 G8 t \' C/ rS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s* `9 _3 t0 _8 n; q2 ? p
; m' V% T, u, P% O
) H% ]9 R4 J9 d$ v/ Q5 MS3'=40 B3'=29 F3'=31 ' X) g3 \2 M( D9 E
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
2 G3 Y! ?8 V! h+ o0 A$ a; L" l0 yS4'=40 B4'=29 F4'=31 - b8 W' j% j6 T
: B6 y" Y' M2 }4 T/ O0 g4 ~
: q, `+ ^0 W r( m4 S) @(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
5 w7 i; z% q7 c2 J9 p1 T% g8 U: y* R9 Y/ Q" p9 \
- D9 O% O+ u3 \% K, K好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 . O6 z( ]$ K, v- }! Q
) q( ], k9 L T& t
" U/ d- L( {5 T% M# EB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 " O+ Q. O: Y7 a) J# y3 {
3 [$ y) s$ m$ Y& c- a
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
$ u) _1 P% m# O" E) J% p1 W! g/ @% P0 c2 N4 Q3 f% Y
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
, b4 H9 m6 @$ e/ U" r" s: `9 E ]' p: I. D7 h. {
0 b' a( e/ u/ Y# pG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
1 P0 A: c* h% C- D% \+ D$ n) P# X# M W+ q% t: h# [: \% @
G11=B1*B'=3.15*28.75=90.56 ! ], e9 g. k$ t% W
* @7 ?5 U6 t2 }( c& W& e6 d2 M8 v! [
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
0 W7 d! T) f8 m6 |
; D) n$ B" U% B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 \
% E o7 F- W& T) `/ e6 w" P9 Z6 C* |* h W0 f7 S7 s3 A2 @. G$ i1 ?+ T5 z6 y4 B7 _5 g1 S6 K* ]
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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