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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
+ A: R; x. S9 b" H8 L* K3 W* f/ a/ y4 p# R- a1 ^9 v! c
8 a' t0 f7 D }7 E: o凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
: N$ _; ~0 m: w) {; A) H
) _; n `+ L+ b- ?; o' ~! H% z2 QG3=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)
" v( a$ Q9 w5 {7 N5 I& K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 C) N0 T% Q. h% D& Z: T- |6 d- F" U" h& x
& t" ]0 @) w! L( u* H% h
" d4 g8 `7 R1 o8 a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!
6 T$ R& q+ D% H3 Y9 k7 e6 Z/ _5 C5 S: K8 T8 s
$ Y G% o2 A2 p! t/ ]做下算术了: 2 i( y$ \ W: ~: {8 \" `) U% ^+ F* \5 C# Y# U* y* X4 ~; N
; ~' L. y! k5 F, M& W+ d
% E3 `: C: _; x* v(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n+ w0 O! k' g0 v
" K7 b4 w9 b- a0 N# U( U4 A8 `. z
(2)立博: 2.10 3.25 3.00 6 q8 a: V. i0 Y- c; c' [ V
4 X$ A) ]' M7 ^2 `9 I7 j! o) i8 A(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t. n$ k% r8 |' I, J* N, N
2 Y- h7 g* z/ w# Q U7 w(4)易胜博:2.25 3.10 2.95 ! H" m0 F3 J4 `8 {# D0 q. f1 j
- U+ {+ l. `) m% ~. _9 c, a% I% s' G+ V v
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
" o$ v# Z1 u: u+ A9 U5 F8 F, p$ }' ]( i% c
) j9 i/ x% p6 T" ^ W: i0 J# O: [S1=2.22 B1=3.15 F1=3.01 9 h& o3 I4 w$ B- a
; t% b. I4 C# s! w/ t2 G
S2=2.10 B2=3.25 F2=3.00 ' z7 _. [& l/ w" @0 e8 W1 ^3 y
% ^# T/ X4 W2 j% ] s" d- o" ?, {, ]$ j4 Z3 ?
S3=2.20 B3=3.10 F3=2.87 % d. E! H" L+ E) h9 r" E
9 A' e& q. H7 B1 c9 S5 j
: y1 U& D$ m: `3 t+ eS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \ W2 }2 A" \# U/ r0 C+ @3 X8 V- ~
8 w( d5 ` _0 H- N/ h7 V4 v
; R$ ?" E# |# P! r7 n2 \1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
- n2 r3 g7 q: T# ^, b* d5 r
5 V, }9 a4 y7 Q/ ^ W5 H/ x1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
. g+ f0 D( i* a' g0 G- f9 G2 a
6 z9 I, R* ]8 C. n1/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
" M6 e$ V g* ? _- v+ i x& \$ n/ n7 C7 X
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 4 z& x. H9 M5 j2 }4 {2 F! @
: G+ x9 Y- y- K6 r
6 `3 v' Y% c9 q/ lS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T8 a, [4 a9 [: r( i! e) N
* q6 g3 R. y% g" v# Z
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
# G( w% T$ e9 ~! U; h1 T; h' q w& R( P5 p' p0 Q
S1'=41 B1'=29 F1'=30;
, ~: H' _! m# x+ e8 c
( [% u8 _/ d2 ], OS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
# O6 ]- p# W' c2 L& q( P; m' V% T, u, P% O
" Y1 l' t& e. u( f+ {5 CS3'=40 B3'=29 F3'=31 7 }! U+ L/ q- x% A7 N3 Q" t
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
0 m2 H7 H: E6 q( _7 W& D6 O+ f6 pS4'=40 B4'=29 F4'=31 ( X/ N+ T( r* b7 |. o6 g
: B6 y" Y' M2 }4 T/ O0 g4 ~/ Q) p" s- s1 @
(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( [. o8 f" X5 B! O+ B$ I; q8 _
* R9 Y/ Q" p9 \, D q# f3 G3 n
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 : {+ Q6 S# [$ N7 _& m& g" Q
) q( ], k9 L T& t
# [8 n! u3 ?1 s! F, `0 NB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
) o1 \9 I9 V, e! r* H" I% e" I" I0 I) C
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 8 i* g4 p8 T4 Y. b- E% m
- t* ]# m/ k9 p; N/ I2 O% d4 p
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
, A7 S2 I9 @: M, I, I9 E ]' p: I. D7 h. {
0 t! o" f: C: k X8 p& p ^G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M2 r* ^1 T2 @+ F/ a
+ D$ n) P# X# M
+ V# p/ P% }0 \+ o; eG11=B1*B'=3.15*28.75=90.56
/ I9 T$ {1 J3 N. l2 X
" r- P! M1 N' d2 g; [2 R- Z" GG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]1 Y6 X! w. g, H
2 @% R! P1 L1 ^; M
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 \
5 @9 m* J% I2 b5 m9 y3 E6 G6 C* |* h W0 f7 S7 s3 A2 @. G$ i
& U& z$ S) k4 P7 A$ @" D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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