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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
) @8 E6 {$ `. Y8 g+ U* f/ a/ y4 p# R- a1 ^9 v! c' J6 k) l4 J: _3 Z& \- O3 s. C
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k! p& z: A! F, i9 L3 m
7 S& u8 |! m% K8 C
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 {) a3 W- U. f+ R5 N
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. [
- E( U5 i5 ?- p) w* [& _+ L8 t" }$ f; o) }; `
& t" ]0 @) w! L( u* H% h, G5 d7 U' a9 O6 K, 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! 9 L. E* \$ ?* u$ l# h$ X4 M
7 e6 Z/ _5 C5 S: K8 T8 s% L2 I3 `8 Z- ]- r6 R+ W
做下算术了: 2 i( y$ \ W: ~: {8 \" `- ^; J4 A% z6 d6 ?. L" j
; ~' L. y! k5 F, M& W+ d
! O- V9 J/ F9 @* Y/ ?(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n3 f6 d8 e) O$ V0 q# [7 j
5 d1 e) V8 g% E- B(2)立博: 2.10 3.25 3.00
; x0 N5 A6 B- B& y, S- H6 L' [- t* h, I& e# ^ w6 j; E( z
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t6 w; h$ \7 O; H* J
3 ?& b0 X$ a4 @. X
(4)易胜博:2.25 3.10 2.95
, O: y9 L& m3 |* o7 G. s3 @- U+ {+ l. `) m% ~. _
0 f1 \1 Z/ L) ?# O2 ~7 {5 K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 , U& A$ F$ ]% o. t: i3 T; ?
5 F8 F, p$ }' ]( i% c+ p, A1 h: i4 y) C
S1=2.22 B1=3.15 F1=3.01 / W; K. o! q, c& K& p1 R# }( m0 n
5 X! q: }' s$ N# l9 x7 r2 j
S2=2.10 B2=3.25 F2=3.00 & h; I8 H9 u( t, j7 z
% ^# T/ X4 W2 j% ] s8 {( q( f3 J4 A9 R, L& p
S3=2.20 B3=3.10 F3=2.87
& b9 s( w% O& O6 p6 m4 n6 W' ]9 A' e& q. H7 B1 c9 S5 j
( w' Y% G" z7 W3 XS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
; p2 v3 \, Z6 W8 w( d5 ` _0 H- N/ h7 V4 v: @4 g6 U- \0 w* Z
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 0 q" Z% M. ]2 |- f' G+ k& U
* K6 ^' J& I+ \' \" Z( j; V2 H1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l J& N1 R, Y! d$ j
# e4 J9 R# e' S4 E1 N
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
1 E' q3 B2 S1 E! l4 c2 _
3 c$ P; j; j9 n; E8 L9 I3 z3 I1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 3 n0 T9 G" t2 ~# S& c! l; J, f
: G+ x9 Y- y- K6 r- }+ x0 {# l& z+ ?; `1 O
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
; t1 a$ ]' p1 Q# f3 R/ o
" {8 u& E: L& ^$ c! @& f! J9 X类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j- R+ b. U6 U. b1 p/ J; U7 f
8 J/ y5 j# L) l
S1'=41 B1'=29 F1'=30; 2 L) W: u( c+ ` \4 m) r9 K
3 E8 L4 K$ |- z6 `0 kS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
* p5 w, c7 e, }* _, `; m' V% T, u, P% O: G8 G# d4 q t
S3'=40 B3'=29 F3'=31 B+ `7 j, I$ P: M; m3 w! y: c( `
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a0 t, Q1 A7 L# R# w
S4'=40 B4'=29 F4'=31
. l* q- ^4 L D! A% N: B6 y" Y' M2 }4 T/ O0 g4 ~. C0 Y) t. u1 J0 z
(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
9 K9 h) T' v0 f. j* R9 Y/ Q" p9 \
. ]3 i( J; y, f/ U$ u好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 6 l1 E, W( a+ `) N c; Y/ M
) q( ], k9 L T& t8 z& N+ Q# W8 m6 K2 |+ Z
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
9 f6 F9 ?+ S/ O" E
2 N& e, i- O# CF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 8 A/ h9 b$ o7 {5 c& F0 t4 |1 W+ u+ _8 f
' Z" Q9 Z* s! [& g7 f于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
1 h: w; M8 a: i1 P9 o9 m9 E ]' p: I. D7 h. {* o( H# m. D: u+ G* Q
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M: W$ \- a& M& r* H: Z8 g+ D
+ D$ n) P# X# M
g9 e' @5 V u1 K9 W$ ^0 FG11=B1*B'=3.15*28.75=90.56 ) O8 j( N7 H! W1 T
0 Q3 ~% G, y' X/ ~: c% U1 S+ ^G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]; _7 S6 z: s7 P! z2 i
4 D! \# U$ v. W0 ~, @
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 \
( i- u. l: w% z6 W" C0 @, v0 [2 L6 C* |* h W0 f7 S7 s3 A2 @. G$ i
( y. X5 \$ ]% h! M# N% i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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