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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
( I. |. y& C$ n) i- x* f/ a/ y4 p# R- a1 ^9 v! c
2 G/ S- R! T' @: ~! ]. v凯利指数的计算方法: ( O1 m2 a L3 d; F& D k- J7 C' w W6 T
+ R9 s4 p* c* o* o/ ^
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)) ?/ o, {( x- ?+ c- A0 w
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. [
' m" [5 S0 H% k$ h" @4 T) E% d
8 |% H3 M0 z6 I- @# [ W. b* G d& t" ]0 @) w! L( u* H% h" v: p: Z6 I; l
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! 1 }# M- ]; p3 n6 Q1 _: Z6 Y
7 e6 Z/ _5 C5 S: K8 T8 s' v3 b8 J0 O: m6 k7 {5 B' {& `
做下算术了: 2 i( y$ \ W: ~: {8 \" `( S# G1 @5 p) }4 n6 c, J' @$ Q
; ~' L. y! k5 F, M& W+ d
1 Z6 D; P- j2 w* F6 l; ^% d P7 J1 i(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n* U% a$ a Y3 g' S( ~0 R. p
6 H( L/ r9 w! C(2)立博: 2.10 3.25 3.00 3 h8 N$ d# K% T1 ?. `+ ?
# R1 Y* f4 W" |+ }0 G% B5 x6 x/ @(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
c2 s& ?5 m7 a
/ \. @; K2 `+ k! }4 |5 l+ S(4)易胜博:2.25 3.10 2.95 & t* F V4 D( u; P6 w
- U+ {+ l. `) m% ~. _' o9 S" o% a8 W
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 3 i4 A3 J5 s' J' ~* _7 n; {
5 F8 F, p$ }' ]( i% c
5 s8 ?% s9 U t2 Q, _5 AS1=2.22 B1=3.15 F1=3.01
4 M8 p4 x( i( Q- p) i& c1 n+ Y) Q0 q; i8 Q3 n, {) ?
S2=2.10 B2=3.25 F2=3.00 2 l' D( \: k8 a) N! O w/ ]
% ^# T/ X4 W2 j% ] s
; M/ k' `1 ?, d" J: ZS3=2.20 B3=3.10 F3=2.87
. _' D6 e8 j# @! T9 A' e& q. H7 B1 c9 S5 j
) \& j) X" e" Y1 x. H0 M" {S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \5 \/ g) ^+ `0 M6 r! @9 B: h
8 w( d5 ` _0 H- N/ h7 V4 v% r1 x+ ]( H- Q' R
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
5 z( B, Y5 y; ]* z: g) h# _5 U; x; m% {/ N; j9 t
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( r- ^! \1 n( M( l. n! B, Y
3 Q5 C. a. W2 x9 m2 y- Y- e1/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
$ B1 r0 ~. g! Y; O9 `9 \3 v
0 U5 `; V& Z8 T4 s1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 1 O$ M' v) K+ d
: G+ x9 Y- y- K6 r
) u' _3 L/ u/ ^0 s: rS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
, ?& k/ l/ t$ d" l& A' V' t! j; q
) f! c' @' U$ e" ^类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
; N0 P0 ?/ ^) M, T) F" t5 E% k1 @5 |- I3 T4 u! X& u; ~% k" g
S1'=41 B1'=29 F1'=30;
! Q* x! |% i4 x7 B4 n" [' I: l' J. P) _7 s/ G% i
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
( G1 w- j# Z; y0 o8 r( V) y2 ~; m' V% T, u, P% O$ n# F8 e% ]; `; X% i& P/ j- D
S3'=40 B3'=29 F3'=31
% R2 n! \+ P+ B( _; b% I2 g6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
G- d% M+ V3 RS4'=40 B4'=29 F4'=31 2 p. W0 O6 n3 `8 {; J
: B6 y" Y' M2 }4 T/ O0 g4 ~
- ]/ [; A- `" [# H: R8 B5 G- ](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" j: \0 I- [8 M5 L
* R9 Y/ Q" p9 \
: w9 h+ k0 _4 q+ F: l好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
6 g' f+ _- H5 o- z: ?) q( ], k9 L T& t: w3 u5 T) m) u! ?
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 : x4 H- }: j, F& t
$ r$ \/ U( B5 H f8 x- A( t
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
: P0 x6 M+ X3 X- J) l
& L* B3 i' d" a6 q, f3 ~+ C于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
, m3 f& w5 f3 E$ ?" T. g9 E ]' p: I. D7 h. {
8 `2 s$ Y( O, v- t/ U. kG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
# t% T1 G& b9 N" ~5 {+ D$ n) P# X# M
' f0 Z% r) m3 ^' m* W8 M7 V5 H. ~- CG11=B1*B'=3.15*28.75=90.56
7 T3 U/ Z' {4 J7 S/ o) O) C- a: k; ^7 P0 U. \. A( u$ J) j
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
8 ~, g5 F7 a+ X% z; W# \0 d4 u4 }+ e) v( \
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 \
; [- U% \8 g# X$ u4 O6 C* |* h W0 f7 S7 s3 A2 @. G$ i
* n+ T3 v; w1 E" b& _6 G$ q+ n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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