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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
) v2 J, R; C' A; D7 U! I* f/ a/ y4 p# R- a1 ^9 v! c. d" m) c$ Y# E6 r8 F3 G% S- @: I
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
$ b4 [* A9 z. }- d' U* K G- L; J
! E9 d# J0 P: {5 P# K- I6 VG3=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)- t6 a& R$ S: 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. [
( p% K: X8 J0 e5 h6 K' e
; B/ m' }+ v! \, F7 d# N9 `5 O& t" ]0 @) w! L( u* H% h5 Y# q3 v9 V7 b8 ]; 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!
/ Y o2 z5 I) L1 Y# e6 G5 n7 e6 Z/ _5 C5 S: K8 T8 s/ |9 {& U, Y3 Y, i8 t( W
做下算术了: 2 i( y$ \ W: ~: {8 \" `
" O8 ]- C/ a/ I6 z; ~' L. y! k5 F, M& W+ d
2 B' y# c) A2 ^) b+ v! ]- W(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
' I( |! X( j" x& m/ o9 D l" [) ~% @
(2)立博: 2.10 3.25 3.00
5 G. Z$ t4 V/ O! [( R
3 x/ Z7 e% k, a& O$ K(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
5 y2 V' e* i3 H/ M$ N. p3 e+ ~" c, k6 f2 Y8 V
(4)易胜博:2.25 3.10 2.95 E X: N$ ~3 q
- U+ {+ l. `) m% ~. _
4 ^/ ~/ E9 Q9 ?# ^7 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 ( R/ R7 H6 E6 n. m, S" c
5 F8 F, p$ }' ]( i% c/ w2 U+ Z. k* T+ p
S1=2.22 B1=3.15 F1=3.01
- k# L; G1 t2 Y `! O8 [/ b1 x+ L/ X- X* o7 C* x
S2=2.10 B2=3.25 F2=3.00 : J, {$ G6 s; L7 J2 N& t8 \1 g9 O3 O
% ^# T/ X4 W2 j% ] s s; @' {8 \5 H+ H; w" G% H
S3=2.20 B3=3.10 F3=2.87 5 c; U6 z0 @- c
9 A' e& q. H7 B1 c9 S5 j
0 F8 S6 t" t$ W) q- p( rS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
3 i& ]' M3 v" o1 @, ?2 f" Z8 w( d5 ` _0 H- N/ h7 V4 v
6 M5 v) O; d3 R2 p& y1 W% x1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
, ^% Z5 V [! {2 C) M- J. _
0 Y7 z6 g3 [% c; P8 P1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l3 a3 y5 j- |# c3 I- b- ?- I
9 W3 M/ V* E' @
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
- F. E% z4 L+ Q* [) ^) \0 t' p2 u% t4 g* F( B3 U
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
6 i0 p. \# h! Z, Q: G+ x9 Y- y- K6 r
. e" E- P, N+ d6 c% P5 pS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T: N: Q7 D6 m3 B G& R8 I+ y
/ n/ U! U8 w& y7 a$ y类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
$ D6 Y" M7 V0 b3 r, p+ T& ~4 c; j1 [. c! @8 P" B, V0 |+ H
S1'=41 B1'=29 F1'=30; : h; K' @; s: k, p- t
3 C4 r( q! v7 i q7 g
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
( g4 p& o0 p5 Y6 e: p, T; m' V% T, u, P% O
$ V1 w6 r. S" ?1 _- Z) G3 y1 JS3'=40 B3'=29 F3'=31 ( n8 r' p1 W: |7 e# y& K
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
& k" ?% D/ Y SS4'=40 B4'=29 F4'=31
$ x. k- [/ O3 d, H, D9 A/ A: B6 y" Y' M2 }4 T/ O0 g4 ~
# [6 ?; Z/ w. P, e: H# W(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( [. o0 |7 T4 L7 \9 n+ J1 k( Q$ c
* R9 Y/ Q" p9 \9 A, `* o, p' z9 \2 m3 U
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ! ^$ M2 Z" V- o' I
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 ' s: Y+ s* U" _) ]6 {) j
: p5 J7 T5 Z c; \* A R* NF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 # S2 H& p, R W" E
3 T; ]( V3 y6 f9 S# l" y于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
- J; @: T3 O+ p6 P% M( D9 E ]' p: I. D7 h. {
9 p4 M/ x5 r- L lG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
& m3 \; p. [: U( Y6 p4 t! p+ D$ n) P# X# M/ p) g' ^8 C" Y# E& J5 z L9 |
G11=B1*B'=3.15*28.75=90.56
( M* J4 ^% N, H% W$ [! X( n4 M4 r# p; h* j' i3 m
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]" g/ H' a& s5 k
8 }( h7 N( K7 H# [9 m5 o3 B2 @ g
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 \
8 f! I) P! A! o8 e6 C* |* h W0 f7 S7 s3 A2 @. G$ i4 J& P( _9 H2 Z1 }% P+ N3 p
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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