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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
4 h; x9 T4 _ [8 p4 i8 w/ e E6 H* f/ a/ y4 p# R- a1 ^9 v! c/ K- e& _3 n4 c' f6 C
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k- A0 I1 R5 e; j6 R) w: n
8 B* x. y0 u5 _. L3 v, AG3=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)
! i" G0 s* m A/ S/ e1 p! d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. [
' }( T& g0 j& u8 W' G( R( [9 G! G: b4 y: _- q7 I
& t" ]0 @) w! L( u* H% h
( ^1 p$ O% y2 {8 }+ W1 E- b; m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!
6 o# W L v' j7 e6 Z/ _5 C5 S: K8 T8 s
" \ |; o" s! y做下算术了: 2 i( y$ \ W: ~: {8 \" `/ L+ {8 ]* U+ ~! D( J: |8 A
; ~' L. y! k5 F, M& W+ d
2 N% o- T" j# _(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
" T1 x; h: I |! U1 `! I
& ~: W5 F* r9 ~) _5 E7 O% R X! d4 D(2)立博: 2.10 3.25 3.00
* f& _ G8 O% P# [" T5 x
- N$ E% k3 t) `# Z- p(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
5 U9 x' c/ o% @" L- ?2 l* q" V: l
(4)易胜博:2.25 3.10 2.95 1 a. K9 _" \2 M& @' Y. h2 X
- U+ {+ l. `) m% ~. _
: }8 o, W+ u8 E' 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 7 q( F# V7 w& K9 E
5 F8 F, p$ }' ]( i% c4 r1 U: i6 {' a1 `' l
S1=2.22 B1=3.15 F1=3.01 0 ^! B. u% _' @$ ~1 c& t
$ a) b& O) p& H3 c6 ^9 VS2=2.10 B2=3.25 F2=3.00 - v: e8 [2 X2 r% ~' f
% ^# T/ X4 W2 j% ] s
; z0 Q3 o4 V8 h4 s$ }S3=2.20 B3=3.10 F3=2.87 , I( N" H2 v) @
9 A' e& q. H7 B1 c9 S5 j
, i0 T+ e" Q+ v1 {: wS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \+ D# z* |2 X i+ j# O
8 w( d5 ` _0 H- N/ h7 V4 v
~8 w5 P: J. y* f8 n1 b1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 6 x4 T+ Y' a0 Q m7 s w: q E9 g
& _- M9 t$ m6 q2 a- X6 a1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
" v3 d, \0 ^. }' J6 b9 V! J4 g+ n! O2 M2 w, Y6 G3 |
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
" @ T6 N0 h8 x D) {' \4 l, x# s2 g: @' _2 s
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
4 w, a/ V' c; W( P6 X0 i3 f: G+ x9 Y- y- K6 r
9 p$ A" K/ }& h" sS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
. h$ V$ y) O+ J* u! U$ ?5 I M; K3 M' }
6 b& d& U1 K- r" t* o4 w类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j+ k, M& _* W4 d h3 I
; N. x" N8 a) RS1'=41 B1'=29 F1'=30;
( h1 M6 D" G" p) [* H, g* q: R* H& X, \/ T; R6 p
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s4 b& O5 @. S! s3 {, Z
; m' V% T, u, P% O: h0 |9 v% u9 f9 X0 b# d* ~
S3'=40 B3'=29 F3'=31
; K' P" l- j# V3 ^6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a+ i: ?" e! T4 k4 |4 x+ L
S4'=40 B4'=29 F4'=31 ( a3 m/ l9 p% Z( H. |, F0 u
: B6 y" Y' M2 }4 T/ O0 g4 ~! S, J# Z2 G) G0 n
(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% l6 O* \) z0 K/ F
* R9 Y/ Q" p9 \* a2 \1 \2 y$ E1 _- {% h" u0 m
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
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8 }* p* z) X: _+ T2 m- i. D% @& t; lB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 8 g$ a6 p: }2 E5 `+ b3 A+ B/ `
1 L) k: V; K& {4 H0 {) W( TF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
, r& ]5 B1 @3 W3 d" a( [/ F! D6 v2 q9 J5 M- z3 X3 i+ S% q1 m8 z
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
4 _1 x$ h# Y) P7 v M! T9 E ]' p: I. D7 h. {
* K3 I O5 H6 G2 R2 h( g' B# GG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M0 W0 C/ {* x# w& C; i" d
+ D$ n) P# X# M
- |9 _( v& j0 ~) {G11=B1*B'=3.15*28.75=90.56 ; n$ D; ?7 n @( l0 H* x: @
# e/ u4 n# \: y1 sG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]! ]+ e7 }* N& J3 g
0 j0 s: g) u3 u2 A7 D6 v
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 \
# [, N; O* O9 q$ M6 @6 C* |* h W0 f7 S7 s3 A2 @. G$ i
1 t5 V/ F0 h7 r* s' ]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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