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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
9 E8 n+ h+ l9 l% G5 p* f/ a/ y4 p# R- a1 ^9 v! c
: l& x6 Y; ?9 E/ W凯利指数的计算方法: ( O1 m2 a L3 d; F& D k0 L' Q; N' t6 \3 I: Q: P
& f3 Y: u# G9 ]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)( N# i4 L6 x" X" y/ W- j
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. [
* P1 B; ` c: R4 ~
! X& K r4 I. N. a. ]. Q& t" ]0 @) w! L( u* H% h
7 u! J3 F7 Y1 K- R, w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! 4 P6 d6 Z( {/ w. A8 i
7 e6 Z/ _5 C5 S: K8 T8 s
3 D$ Z2 o7 n6 z! f- \) r8 d做下算术了: 2 i( y$ \ W: ~: {8 \" `' y% u! ]* X: t. S, q
; ~' L. y! k5 F, M& W+ d+ q+ b) A1 {- h4 X- m
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n/ ~9 e( B' X, b1 |# K3 G$ w
$ r# ?% _% V. R! v) M/ ]6 c# p
(2)立博: 2.10 3.25 3.00 7 F8 _5 N8 A1 u% v0 ]& D
5 Z) _4 w* F! ?/ M" \(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
& L) b' N$ J. z0 r: A/ ^0 R2 b: O! p W7 ]* O! M3 [
(4)易胜博:2.25 3.10 2.95 . J& ]% b; w+ a9 Q
- U+ {+ l. `) m% ~. _0 W A, U* \5 ?. f+ P
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
0 ?4 ]8 }, p O9 J7 D5 F8 F, p$ }' ]( i% c& |! R( N4 [: T4 u' x8 y$ L8 w
S1=2.22 B1=3.15 F1=3.01
1 s5 [# Y6 O. `) H9 y' |
) a# Q. X$ ~* W- DS2=2.10 B2=3.25 F2=3.00 2 {% z* W+ a& S( a
% ^# T/ X4 W2 j% ] s) O# ~+ v& }! T! i/ s, o2 A
S3=2.20 B3=3.10 F3=2.87 5 l1 p { h+ s7 g- D
9 A' e& q. H7 B1 c9 S5 j0 G. A7 R$ s- P
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
6 U: v# B& M% _# A! a8 w( d5 ` _0 H- N/ h7 V4 v3 _( V5 `! y# _ @* G
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
. w6 l/ j5 ` E# z0 _' P4 B: l4 N
% u8 N/ J1 ? j2 o5 P" N: P3 X1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l8 U* R, R* e7 W
1 s) L+ B5 k+ X2 d( x9 q
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
! C, s; o9 d9 ^6 n I( y$ d5 S+ L2 D' Y4 B. v
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
5 [5 v+ b# U. ~$ g! ~: G+ x9 Y- y- K6 r& o9 Y' P# V0 ~6 F- b' s1 t
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T. C4 f8 P8 s" q3 s8 |) G
" k! D5 M4 U2 [1 }6 @0 Z: Q
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j6 w, @8 J8 Q. @: l2 F- o5 K# ]
) m6 r2 O9 g" E6 O% s% K0 |2 r
S1'=41 B1'=29 F1'=30;
4 i: G: m( X9 q1 P# f4 o r5 J1 U8 \% R9 q" g9 R1 t: z
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
/ I+ w: ^. g1 U( ^: j' x; m' V% T, u, P% O+ y; X$ h8 i: C, X5 f2 M
S3'=40 B3'=29 F3'=31 . Z |1 O L0 e+ Z5 I' v9 G
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a( n6 X5 K9 P% s ^1 U
S4'=40 B4'=29 F4'=31
0 }2 a, M. ]$ s: B6 y" Y' M2 }4 T/ O0 g4 ~0 b6 J8 A6 y( i5 ~
(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/ b" H; m5 T1 _7 {. g: [% p
* R9 Y/ Q" p9 \
. \7 j8 ?: Z7 q5 P( U! ^5 {好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
1 i. o/ L5 d$ W- @3 v# r8 L) q( ], k9 L T& t# D2 k7 O# N& e4 B0 g4 d
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 " y* G9 e8 {2 B- Z$ A9 w( U
; ]" w, ^ v; _7 oF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
0 W( t) H( P C" e; |/ g/ ^+ L8 _5 _8 Q
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?& L2 V& z. L+ x8 \8 M. I7 |3 O1 l3 L. |
9 E ]' p: I. D7 h. {" S3 P- U4 [+ \. [
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
' D8 `; a) U$ Z' q/ p5 O8 ~" s+ D$ n) P# X# M* W* x3 M, Z6 g1 M
G11=B1*B'=3.15*28.75=90.56 ! b% K o4 c7 I& [9 D7 N
2 D9 n; h$ P) S$ [3 eG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
$ a$ v4 g# k8 v$ Z$ h; |+ z) O* E. U9 K4 h
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 \
$ F" D( Y* U8 D- c6 C* |* h W0 f7 S7 s3 A2 @. G$ i7 G9 z I) O, {% C: I* V5 m. W: 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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