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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
. @( l! M+ F" K! X* f/ a/ y4 p# R- a1 ^9 v! c
! l$ @: G2 U( [! t2 B7 u* s5 u* u凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
7 Y, S/ C; f' u2 n
2 |) U$ f4 t7 a q( @1 U' lG3=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) V S2 _) p3 `
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. [
1 e: @) h& u: k# h, W; k) S
& C- A# H& P! y1 [7 M* R; U& t" ]0 @) w! L( u* H% h
/ m+ u5 ~, R- n9 y7 H$ l" F3 ]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! ; E, A ~/ E9 y( ]+ D9 j+ W1 F
7 e6 Z/ _5 C5 S: K8 T8 s
4 O4 v! v. }, e2 j做下算术了: 2 i( y$ \ W: ~: {8 \" `
( S! ~ D; K) J8 f# W1 A5 E; ~' L. y! k5 F, M& W+ d) W! G6 S1 V! a$ L/ s
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n5 @" C3 G# ?9 m0 w* H( s$ H
$ I9 ]' [5 Q: m, v(2)立博: 2.10 3.25 3.00 ' O9 {: H- |& s. K5 c
5 P* |7 S- y" w3 n2 t& r, P
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t7 |' `$ c- F5 R% v+ y# f7 g
' Y" [1 W2 j1 L+ X. W" C
(4)易胜博:2.25 3.10 2.95
' T6 B; O- [+ e# q4 x% @- U+ {+ l. `) m% ~. _# N; C: }: P5 O: w* ^7 |
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
, @( K6 K1 O3 j, y! d0 E5 F8 F, p$ }' ]( i% c
1 w' j3 R; S! QS1=2.22 B1=3.15 F1=3.01 " l0 w6 g' O& h: A& B
5 W5 u# M$ C" W
S2=2.10 B2=3.25 F2=3.00 9 R+ s3 e, u0 q2 S4 n
% ^# T/ X4 W2 j% ] s
- G j8 O$ O' F+ |$ l( FS3=2.20 B3=3.10 F3=2.87
( z, F6 q2 r* e# t8 c# X9 A' e& q. H7 B1 c9 S5 j! A" e( t( ~. n. Q9 a! Q9 D
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \# T7 v- Q! b7 s& w, Z
8 w( d5 ` _0 H- N/ h7 V4 v
- n) U* w& Y' \' u# G0 G7 C1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
, }- @/ D* o4 N0 x4 `
$ i/ T/ }/ C! @/ B; y1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l9 v( L+ a, z5 R2 ^
$ ?5 \ A8 Z2 W; U) D6 Y1/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- b& k3 I- j3 O* f
: b! y3 q6 q s) B. |0 L1 z
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 ! e0 u2 n5 t6 K8 ?/ \4 B
: G+ x9 Y- y- K6 r
' h) c3 {1 ~4 gS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
4 m" y9 c- M( m6 _; t% `- D8 V
) x& G( L2 L; d8 q& E0 Z类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j2 G1 f$ T; l$ w6 y0 N, q: P
' x6 e0 F7 W6 V5 xS1'=41 B1'=29 F1'=30; 3 I/ X$ R6 |2 W, H( o8 N
, H+ S, M" c1 c
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
$ M3 u0 V, ?; v8 ~; m' V% T, u, P% O8 h- O6 F* q1 s- \; i+ Q( W) m' T
S3'=40 B3'=29 F3'=31
- |: U# |! C0 E( _7 y6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
* S; U2 f( ~0 Z9 _5 j) Q# SS4'=40 B4'=29 F4'=31
- j/ T7 g {" h1 J, }( a, x# e: B6 y" Y' M2 }4 T/ O0 g4 ~
* E W( a" H3 P8 F$ u2 n(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 L1 a3 k) D3 T" d; P
* R9 Y/ Q" p9 \
9 E: n0 Y% g3 j N- N好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
. `6 \' {' ^! d5 o+ o) w) q( ], k9 L T& t( l) b' l9 N$ c4 d$ B0 S
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
7 {: T3 z' V1 l4 \& R1 ?0 Z& v O1 S$ o
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
" z3 l3 X% b, g# d* b
6 _9 l3 u9 s( c6 y于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?- ^. h5 v5 J4 ^3 X
9 E ]' p: I. D7 h. {
6 |$ z, O7 ^6 b! iG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
7 C) P) T) H, }' n+ D$ n) P# X# M9 L' V$ K2 Y4 E5 `$ R+ ^
G11=B1*B'=3.15*28.75=90.56 . a4 \ q- [- b' J/ x
# l1 i( o0 W1 X7 c
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]4 M+ |8 m$ t. Q3 G& }9 L
) T1 t) D4 E' T# r) q, o) @3 j0 c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 \
: X0 W; W, w2 l9 v0 a% l6 C* |* h W0 f7 S7 s3 A2 @. G$ i, [4 t3 ]7 K* s
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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