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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
U3 g8 S2 I, F) B' y* f/ a/ y4 p# R- a1 ^9 v! c
- m4 W$ \# Y0 r' l# Y凯利指数的计算方法: ( O1 m2 a L3 d; F& D k5 A' I, `7 B/ @, x: p4 k. A7 O3 m+ s
6 f I* b* K, @/ Y9 D+ j3 ZG3=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)! V0 k+ [2 F6 W3 q+ r% `. G
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. [
6 {3 e: W' L- X. b
7 h+ z# V+ G6 |6 |8 W& t" ]0 @) w! L( u* H% h
0 ?5 Y. P. T7 X. a5 w% y9 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!
# M8 ^0 G a) P, k J7 e6 Z/ _5 C5 S: K8 T8 s2 ]% _& D- h- N
做下算术了: 2 i( y$ \ W: ~: {8 \" `' D! r i! U4 X
; ~' L. y! k5 F, M& W+ d
% h# ?' y5 O/ b/ ?; E(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n7 H/ z8 P/ r, J6 g
& D5 R' ?- X& W+ a! B: Z2 x(2)立博: 2.10 3.25 3.00
% @3 r, x& z7 g" Q% Y6 F+ x
% ~4 P2 m' X& X- s2 q. d9 K(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t6 ?) t+ Q( K! {7 p: N4 F+ q* J5 `, I
3 u+ E! n' B9 j/ E8 ^(4)易胜博:2.25 3.10 2.95
5 c! D( P1 g2 _$ [. e- U+ {+ l. `) m% ~. _1 d! q0 U' z% I
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
: x) w( |8 p& g9 k1 G' B5 F8 F, p$ }' ]( i% c8 P* b& L P2 p+ W! f8 m
S1=2.22 B1=3.15 F1=3.01
/ C ~# b3 j: Q+ c: l: S2 @% T/ i
S2=2.10 B2=3.25 F2=3.00
) k# W r2 C# c- H- r% ^# T/ X4 W2 j% ] s3 X3 m% A! u( R* x8 s) ]6 h
S3=2.20 B3=3.10 F3=2.87 8 s1 F! l3 b0 t& c% ?
9 A' e& q. H7 B1 c9 S5 j- Y; U L! G- F5 S
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \& A0 E/ s$ @( C, f k. b* @& I0 Z
8 w( d5 ` _0 H- N/ h7 V4 v
. Z' ^1 I4 R& F5 a. u6 q# Q1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 , @3 e* Q9 _2 d2 F
' [$ @+ w4 I3 q" r* ^$ U
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! x$ w s* u& v! y. v
1 o+ I& G( n7 ^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
" q' p1 b) x2 t. Y# I
+ m5 _/ A) ^$ R& b1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
6 v# Q5 F+ Z) K( z& d4 ?$ c: G+ x9 Y- y- K6 r
! c# ]0 y, f$ v! @' U! x& L$ YS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
& t8 K+ Q O& e* t/ e; I/ \
6 f5 g5 _) g3 Z类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
; x N; D! R2 M3 F; D* }: F* s; R! ~0 C9 T: i+ Y
S1'=41 B1'=29 F1'=30;
; |: \4 M" V% g5 }/ K+ l0 V
( L r6 J7 m% _5 _% ZS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s; K% s {' E7 @/ Q7 c
; m' V% T, u, P% O
- M' w8 `& X+ D- k" v! \$ t/ O8 {S3'=40 B3'=29 F3'=31
, q8 C4 Y1 p/ @" h& L6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
5 B; _5 y4 q6 H$ ]S4'=40 B4'=29 F4'=31
: g6 {- c* l! C) ]7 H4 y% J: B6 y" Y' M2 }4 T/ O0 g4 ~
- ^8 C2 x$ A2 p) e$ j2 B# A(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( [. o6 s* t) `' }* a* e$ f6 Z
* R9 Y/ Q" p9 \
- s, n. S9 Z/ A, ^9 p好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
w3 m7 A* H0 k8 `; M' s) q( ], k9 L T& t2 d% F' Q j3 `5 P9 ?
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
+ c) H6 z5 P1 L+ z' w
7 n. k7 Z1 v9 p/ P8 h: }F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 7 F0 a: ~* D6 D* H- k& B1 }
# w6 @& F6 E* l) L5 U6 C于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?4 s S) i2 x$ u/ K1 m% y, B; g* Y
9 E ]' p: I. D7 h. {
% Y3 m/ E$ @" ~& F3 V( i# d8 |G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M% {! [0 o( I" m5 q
+ D$ n) P# X# M1 ]5 _7 p0 p7 ~# f. B/ L
G11=B1*B'=3.15*28.75=90.56 3 B, V" G7 z3 _7 L. J# X& p( b
4 U+ A" Q$ A0 T
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]5 |, A8 N: [7 K$ {9 ?
; K3 k2 q2 ]5 i% O
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 \0 {$ X; R W3 L6 `3 b% D/ [
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
0 ]2 T0 N( b: K1 Y$ ]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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