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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑6 Q- U' o! ^9 _& Z* O: N% e \7 w
* f/ a/ y4 p# R- a1 ^9 v! c
/ i5 y# V5 f7 S2 K4 R: A6 Y凯利指数的计算方法: ( O1 m2 a L3 d; F& D k! y x3 ]- @& e2 C
+ W* Y- G; ?% ?
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)
0 a3 _) R5 t6 F/ M; M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. [
x3 i1 f2 f0 I* o( @8 v5 A4 H- z! G3 r) X& {( V
& t" ]0 @) w! L( u* H% h
/ _' t6 R3 f7 b: c9 K) C8 u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!
& d0 R3 B0 O* N: V# u7 e6 Z/ _5 C5 S: K8 T8 s
5 L; y5 e; z8 _. I4 f- c* T: c做下算术了: 2 i( y$ \ W: ~: {8 \" `- f, r F/ f- k0 t3 d3 C6 f( h
; ~' L. y! k5 F, M& W+ d- V& m r# }. n d1 V/ E$ t* i+ M
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n; |1 `2 z. f; s$ W
/ O- {; R& z8 R(2)立博: 2.10 3.25 3.00 8 k3 K! }8 Y: y, z
) }& g. e/ X5 D$ w' w! |
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t, H6 B" }9 a5 g8 d( g e
" G W, N3 S1 r% h% a7 G c(4)易胜博:2.25 3.10 2.95 , ]& L. J7 M6 E- J9 ~
- U+ {+ l. `) m% ~. _
* K5 R/ N- ?+ R) t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
2 R1 O# m9 P5 A* Q, X5 F8 F, p$ }' ]( i% c
. }5 e# |/ F* N2 s2 J6 jS1=2.22 B1=3.15 F1=3.01 ) E1 ^: H8 Y+ Z* l% \
: [4 Y) [ }. h0 a0 i! D7 W
S2=2.10 B2=3.25 F2=3.00 2 E7 D( q# J6 A" U7 _. A1 [
% ^# T/ X4 W2 j% ] s) |' c- k$ `# y8 n6 P+ c6 o& f
S3=2.20 B3=3.10 F3=2.87 / X# X3 i; L( B4 m
9 A' e& q. H7 B1 c9 S5 j
$ E- m8 r2 d) x1 Q8 nS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
: ~) u2 y# O& `$ [+ C' z8 w( d5 ` _0 H- N/ h7 V4 v
+ d! D2 ?2 b5 J& F' e/ ]* r1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 4 y; a1 }4 _- b# |5 B) f! a. P
* q7 p( \7 a3 I z0 t- 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% l7 j3 \- x9 n0 U- |0 }. R' x
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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+ @, D/ ^+ [2 H9 |& E
* U. Y- A1 Q% ^1 _, j. U4 k1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 6 V' C! U1 `( k- B+ V# w/ g4 H
: G+ x9 Y- y- K6 r
: y0 T8 D6 e; o6 \" [S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T, M- i! X( z0 `) ^; ?" C
2 Y7 `9 }% Y* A) d: |
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
9 c! }4 ^; I, x
0 N4 w5 C$ ?* z* q, A# DS1'=41 B1'=29 F1'=30;
0 K) y5 {( s) p- }, ^3 }3 \) P- y2 I# `5 L& D
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s t: C% ?8 J1 e
; m' V% T, u, P% O* O' V, F5 E$ ], T- \
S3'=40 B3'=29 F3'=31
1 `# a# t5 `! @: R+ d( S; F- u6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a1 K: y' N: C" I/ G
S4'=40 B4'=29 F4'=31
' z3 C: u9 @1 |% u: B6 y" Y' M2 }4 T/ O0 g4 ~
: J% h0 {& _' W4 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
8 y4 q" p* n6 X& ?% ^* R9 Y/ Q" p9 \
8 v2 w, o( {6 Y; }: U好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 " @/ t- h! z. A" m
) q( ], k9 L T& t
/ S! t2 k2 @3 h- d# w- _B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
0 Y( Y: _: W( ^% w/ i
- T- @! N6 @, i1 F7 tF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 2 ?' H% y1 r) s# Y2 B9 h
5 L* x/ p7 x/ g1 Y" I于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?+ H! Z8 [4 F2 v- s
9 E ]' p: I. D7 h. {
8 m6 j4 z& }/ s6 c- h# [4 [) kG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M Q. [/ D0 L! q. ]- W7 N2 i" b( q
+ D$ n) P# X# M
2 L9 i7 B' [- N1 a. {6 ~G11=B1*B'=3.15*28.75=90.56
* m( l7 O* d2 G; ~ u U+ P ]0 \# h* H
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]! s9 v# @9 @. A
2 l i! f/ e7 ]+ 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 \
4 _6 Z! j' V2 Z% {/ q6 C* |* h W0 f7 S7 s3 A2 @. G$ i: b! K/ j3 |8 N+ F7 M; e9 c
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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