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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
+ ~+ ^0 V. f# x- Y* f/ a/ y4 p# R- a1 ^9 v! c
: N! s! S5 i" \, H3 ?( Q凯利指数的计算方法: ( O1 m2 a L3 d; F& D k/ e1 P0 q( T& j% D+ y
5 C4 x! O% p8 r% eG3=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)% ^- Z0 l2 W) F
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. [
3 o5 B" N" n' p+ ~) J9 i3 d7 G- v, E0 m; F
& t" ]0 @) w! L( u* H% h
8 y+ \# H1 c' l0 t1 l- }0 W, 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!
/ _( t( \" P% C! R7 e6 Z/ _5 C5 S: K8 T8 s
- T% q3 K: s- W! O5 Q; ^: Q! |4 K做下算术了: 2 i( y$ \ W: ~: {8 \" `
8 j( \. }! A7 s4 |& |( z. `( E2 W; ~' L. y! k5 F, M& W+ d
. Z$ f. j/ B+ c(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
9 ^( Y6 {2 R% w% L. Q$ I. U: c3 _ z' z1 o- ?9 P7 h
(2)立博: 2.10 3.25 3.00 - }& [# Y* h5 F! c! O
2 h3 @$ @# S" x9 V: }% W) G H(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
& U [8 n1 A3 K# \' E# T& G
5 b' d, A2 d0 D) s7 |* n(4)易胜博:2.25 3.10 2.95 ! P) O4 m: \' N# i- Q
- U+ {+ l. `) m% ~. _- V; ]9 B$ t( l. e) h& @4 }
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 & G; q7 B) `( b
5 F8 F, p$ }' ]( i% c0 D( T6 h I, \) d4 w7 n/ _% ^
S1=2.22 B1=3.15 F1=3.01
6 N+ O- K3 p9 `* p2 B' [; U9 K1 l! D9 s5 H& V- i
S2=2.10 B2=3.25 F2=3.00 " }* P O/ I5 n7 g6 h- m
% ^# T/ X4 W2 j% ] s2 k9 ]1 j: B& F4 o0 G6 ~! x- ]. y
S3=2.20 B3=3.10 F3=2.87 |3 h6 @9 S- P8 \- Q/ Z7 n3 U
9 A' e& q. H7 B1 c9 S5 j
0 t' ^: H1 A4 q: X' Y8 }S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \ E W" l1 x# z3 S. a
8 w( d5 ` _0 H- N/ h7 V4 v
5 I5 w* }$ T. }; z1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 ! M$ }0 D4 s- L: N- s+ ~
: s& I7 P# p3 P1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l1 Y$ Z3 s' Q- Y& B. @" a
' B% F( }( Q/ n7 l# P
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
& V( Q- `0 L1 D" m, i3 G# D7 _) a1 k. @9 ~! G. X' t5 B$ s
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
4 n$ {# |8 e* o L: G+ x9 Y- y- K6 r5 P, \. r2 V F- u( ?) D
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
& D4 C& D3 I `/ g2 i
& h& U8 m" W& X' l类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j# A4 ? f% P4 L- b
# R6 V" |" W$ ^0 ~2 FS1'=41 B1'=29 F1'=30;
( p, m: Z8 F* N. I3 ?% @% {' p o1 ?; d3 |
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
* E# q2 G6 I- q1 c `$ C; m' V% T, u, P% O4 x2 S, e4 c; n0 Y! o. ~
S3'=40 B3'=29 F3'=31
! I4 C* ^1 {, y; ?6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a+ h* F& \$ d2 d' v
S4'=40 B4'=29 F4'=31 ' J9 M- z1 h6 y; ]
: B6 y" Y' M2 }4 T/ O0 g4 ~7 v( N C, q: C7 O" Q
(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
5 f. s! z( t Y* R9 Y/ Q" p9 \
6 T/ X. w8 g, [3 W9 D好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
: Z/ z8 u) f* w& ~2 ^* G) q( ], k9 L T& t' }8 s% `) A9 }, V
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
6 ^1 {2 @" s: s8 j( K! E
' d, D$ g; W& F1 v( g, e# oF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
5 K' d; Z6 c8 @: H" J8 S V0 ~; _4 a! F9 H
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?- x1 y% u/ V9 d- t* A% x
9 E ]' p: I. D7 h. {( m% K" ~7 H. k7 @
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M2 X" ^ I% S; U6 X
+ D$ n) P# X# M
6 s: x9 l; s: A" ^$ D! i, NG11=B1*B'=3.15*28.75=90.56 ) t4 I- o' n2 F! `% @7 I/ w
, c, ~% I* g( Z/ c1 ^4 \) y! K3 xG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]& [" ^' Z6 d# ` q1 U
% p# _3 m, C. _! G% X7 \/ g0 h6 `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 T- b; `; Y: j/ m5 k9 l
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
7 S7 g" @5 r5 {8 K2 W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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