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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
) B/ T8 i8 g# o$ }2 }- N" ]* P4 S% c* f/ a/ y4 p# R- a1 ^9 v! c9 e# e3 T0 W# r* B
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k% {# ]' B( S6 H2 l* X/ A3 K
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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)7 ~; L6 N) A6 i
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. [
' j# O: Z. I7 k: `5 B& t. m9 c+ U# B& J4 r) T, h
& t" ]0 @) w! L( u* H% h
0 @7 C+ b5 c; `7 F5 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! " g* _& [- E7 L, n( Y5 _: {
7 e6 Z/ _5 C5 S: K8 T8 s3 u' e7 m* C, l& c, D4 W
做下算术了: 2 i( y$ \ W: ~: {8 \" `$ k s* c( @+ }' ?
; ~' L. y! k5 F, M& W+ d
* r; W: L, K# J+ z(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
5 C8 {5 u1 o1 u8 a1 m5 w8 ~! k1 n/ i9 T) {) P3 R( v
(2)立博: 2.10 3.25 3.00 # R& m e8 }' H; K/ E, {
4 f6 T& `- b& ~
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t0 e" b" h: G; E( Y4 c- d! R
5 j" J ~% X' d* U0 q2 D
(4)易胜博:2.25 3.10 2.95 $ z6 _' U1 ^3 A. c# V
- U+ {+ l. `) m% ~. _5 }7 B. H7 G" z* V7 C, U& K0 c
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 6 V- y h ^) h9 E" J( Z' o) _% O( s" ]
5 F8 F, p$ }' ]( i% c* i" m1 X& H! a% P) g
S1=2.22 B1=3.15 F1=3.01
, k/ X2 F0 P5 y1 j( @- @) v( r# k5 j
S2=2.10 B2=3.25 F2=3.00 * }( l; F$ {2 S7 ]) M% y5 m
% ^# T/ X4 W2 j% ] s
' f! V3 J; s1 RS3=2.20 B3=3.10 F3=2.87 1 T7 q& }* B1 _
9 A' e& q. H7 B1 c9 S5 j. `6 Q9 d- Z. D, A' N2 }
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \4 G+ o( X6 E: ?& V
8 w( d5 ` _0 H- N/ h7 V4 v
" o$ Q9 O$ p/ H( T% Z1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 # D$ N4 U7 t% l, [. \
; y% d2 _+ \1 Q5 R: L+ n1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l4 ^7 t9 p- K7 x, q% y
, [% J0 [4 Y" ~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' q4 [; P5 t( q6 F$ Y
2 _( c1 R/ f: J" G' N
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 & x7 v' ?% d% W7 C6 k
: G+ x9 Y- y- K6 r; W: o& _ a* w, E- J* H; Z% ?
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
* E; V+ R4 K6 W( y2 S7 s* M
# X) N M9 b$ x7 J) T类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j! J/ n$ r+ H* y. F) _
) j- W6 H2 [' P( |$ w- T- ]S1'=41 B1'=29 F1'=30;
' Q0 k) } W# J% X5 Y$ S8 I8 l
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s- V+ L8 e/ G5 N: T" H
; m' V% T, u, P% O/ V K" ]: U$ m
S3'=40 B3'=29 F3'=31
3 Y) D- p( [; B* A0 W6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
# o4 A& t1 T9 Z- m1 wS4'=40 B4'=29 F4'=31
$ F1 G) o# A6 e% q* {. r4 Z$ ^+ V: B6 y" Y' M2 }4 T/ O0 g4 ~; T, |3 l) c7 Z9 c% }
(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' R: \4 `9 x* b% n& C
* R9 Y/ Q" p9 \
. p9 y' y5 k% Z! A) n1 p6 U7 G好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 3 r, R$ U0 V' E; g% I
) q( ], k9 L T& t0 o3 A5 h9 {5 c$ P& z
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
2 o" I7 }. w% s6 o1 [7 o5 B7 [$ J" F" L
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 : u: M+ G4 y7 A2 J3 F
8 o% y' [" M( K# H% P! s- [
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
/ f- o1 L: z' d+ N( _* \' J1 z9 E ]' p: I. D7 h. {
- V; D. y" c+ k pG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M9 E5 O4 e. u, @! ?( h/ r
+ D$ n) P# X# M
( `3 x( X+ e* H5 T5 _: jG11=B1*B'=3.15*28.75=90.56
- Q4 j: L& k, h, h* m! S& K4 u
! C$ w. V; m ^, B3 LG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
$ f& S; C0 v. C* t# o) b" G: J6 T/ K5 {7 ]! {, D
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 [% ~) e" e+ z
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
# t9 V, C' i+ M2 m D3 t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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