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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
$ F; I$ Y' t J6 B, K9 `. l0 i" \6 o6 m* f/ a/ y4 p# R- a1 ^9 v! c
& t* [/ o% n$ y- v- Z0 Y$ z凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
( Z+ p1 o" T- z7 z* E2 y9 R6 u
6 [" L0 p, x: X1 w0 ?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)9 z. U' t/ s4 G" Q; `: Y3 B
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. [7 P* s: O5 n# H% r' Z
2 F3 S/ c( B' @+ G- q- [
& t" ]0 @) w! L( u* H% h
, \! [. r& ~3 x3 i2 r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!
$ a5 _% l% Z3 R/ j/ n. J, ?! b# y- U) T# f7 e6 Z/ _5 C5 S: K8 T8 s
9 v! _' P h' a* P G( v4 ~. G做下算术了: 2 i( y$ \ W: ~: {8 \" `
1 I C+ L. ]" O1 j+ b% p; \; ~' L. y! k5 F, M& W+ d* j/ o4 w% I2 c
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
, i5 C& t5 n3 P& l) q& Y% h; Q |6 f/ j9 D7 p; U0 k6 p
(2)立博: 2.10 3.25 3.00 6 H: n6 t& ^) ]- F! ]
" ]/ ^/ r, ?( U; x; `
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
& l& S& h- o) q& K
% A4 B" w* D3 h: u: R(4)易胜博:2.25 3.10 2.95
& r, [) e! U: U6 e' |) \- U+ {+ l. `) m% ~. _: M( u7 u- b( j, o0 \: F
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 " `' ^; s& \- M$ T' t
5 F8 F, p$ }' ]( i% c
& z# m" t, s8 o3 P7 DS1=2.22 B1=3.15 F1=3.01 % t: x' U# m# A; q9 \4 h
+ s! _' c8 B/ C6 _5 N# v4 u( ~
S2=2.10 B2=3.25 F2=3.00 # ^5 ]1 o2 k* _/ L g2 M4 h) I
% ^# T/ X4 W2 j% ] s
% W( b& y- u+ S1 l" |8 _2 bS3=2.20 B3=3.10 F3=2.87
5 l- ?9 w9 t; }# b3 J# c2 o9 A' e& q. H7 B1 c9 S5 j
& Z. i1 J( Z1 OS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
0 r8 ~3 t1 w5 B! F' n8 w( d5 ` _0 H- N/ h7 V4 v, a( }' d' ^5 j9 Y
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
9 K6 Q/ E7 A2 d7 U
8 k" M8 V* C( e+ Q ? Y4 [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
0 v ~% p) J; b g, c8 m0 y( h$ p5 A8 n# f. v5 x: c s) b4 r
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' q0 F( w& c( \# g4 j
% D4 g1 u2 i9 I; Y& h7 q1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
" g8 ?" O: L- w \: G+ x9 Y- y- K6 r
/ m8 a# V8 k5 hS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
" u4 I5 J8 @( {# U
9 C! S8 E( ~. U# e3 P类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
. C1 q7 u7 M4 A$ J8 M3 D8 Z& y! z+ i2 J! ^
S1'=41 B1'=29 F1'=30;
1 H- c/ |1 B5 L( ?: q: f7 B$ ~/ @8 N1 D" S3 f, I7 Y. Q9 l4 ]
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
8 [' F8 V1 J6 q' ?& p n; m' V% T, u, P% O
7 c, u) H1 t- y' t# z0 T- F( e! dS3'=40 B3'=29 F3'=31
5 V' c6 r7 J) D* M+ n. h6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a% |3 R. f j8 o
S4'=40 B4'=29 F4'=31 - [1 R' ?1 n0 F% d" A
: B6 y" Y' M2 }4 T/ O0 g4 ~/ X* e- S6 i9 _# {
(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
$ u- m, m0 I3 s2 {% @* R9 Y/ Q" p9 \ @7 w/ x- Q* A# A; E
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 / a9 O( e3 U, _1 D- }9 M3 y; _5 }
) q( ], k9 L T& t
5 ]- \4 w9 u3 D' c7 B* t$ a3 Y$ vB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 1 v. I) z, |7 l( U& y2 A, z L
?5 w! Q ^/ f" s0 }- H( X+ c! b
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 ' r# ]* z1 P d4 V5 C1 _' T
I7 q8 E2 ^; F: m
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?' r7 x' E( w7 {) U0 x; W
9 E ]' p: I. D7 h. {
6 J5 F( O8 y1 p+ d+ fG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
% p& |4 _+ Z7 s& K+ D$ n) P# X# M. r* v/ a' O7 T! Q! c1 Q: Q! e9 {. Q1 u
G11=B1*B'=3.15*28.75=90.56
" Y. c) J; \! B$ h+ b4 b. M
. j* \ c$ ~+ SG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]3 I( g, {8 w4 g: w$ ^& Q! A8 u" [
7 Y5 E/ l# [: A% q* X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 \% \1 a) c+ n y) ]$ j
6 C* |* h W0 f7 S7 s3 A2 @. G$ i+ z: U) [, x" Q$ O& N' x
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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