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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑$ c( m* Z* L. I) d$ g2 j. H
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# c" E4 n% S* }! a: P6 T' v( R$ ]凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
" n G- J* }* u1 e9 k+ e4 V3 n. ^! ]9 D% F$ j, C4 ^
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)
6 t2 P: \5 l' ]5 _) e4 P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. [7 L/ n2 t' p! `) I4 S- ^
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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!
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) I( v3 U. D) F3 |; p6 K6 U做下算术了: 2 i( y$ \ W: ~: {8 \" `
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# w% j+ ~/ a0 Y% g) e(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
7 l3 P& w! A- Y4 j* K$ x5 z8 ^9 |
3 c7 p+ h ^6 U) {/ q* c( U6 b+ Y: w* o(2)立博: 2.10 3.25 3.00
9 ~$ J2 t8 o# z S/ u# J$ w" m
' C: _8 Q8 x- q& H) P2 w(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
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(4)易胜博:2.25 3.10 2.95 3 O& \& ^5 h: p o% U& z( v
- U+ {+ l. `) m% ~. _
+ j! P* f* g T3 {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
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S1=2.22 B1=3.15 F1=3.01
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S2=2.10 B2=3.25 F2=3.00
1 K- o7 o4 P3 ~7 g. t4 f% ^# T/ X4 W2 j% ] s3 I7 Y4 g( n+ l
S3=2.20 B3=3.10 F3=2.87
: o" M2 d7 u% a+ E7 ]! o9 A' e& q. H7 B1 c9 S5 j8 `) N$ W; ?+ a }8 q i
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
8 `' p1 M- ?1 `7 i# p8 w( d5 ` _0 H- N/ h7 V4 v6 r7 y1 }0 e% l1 C: K+ u$ `3 z+ R
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 7 z% _2 a$ Z6 i! S
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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
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3 v6 g1 i) h# ~' f: U1/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
4 l! ?! @5 [' E2 L' W) N+ `4 c( S1 d) M- Q0 X1 u% s9 x5 A# N7 J
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 ; K- o/ |1 u s' M+ V) _2 O* [
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5 l0 m. P/ n; k" e" f; US1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
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类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
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1 x( ?/ X! e$ I5 mS1'=41 B1'=29 F1'=30;
( f% A2 Z" a4 O9 {$ }5 j" Z" p* o2 ~9 n, \2 r r/ p$ k8 o
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
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( {! F" u- C8 M+ X( o( _$ E# u5 QS3'=40 B3'=29 F3'=31
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S4'=40 B4'=29 F4'=31 $ B ?# i6 P: g/ c; J
: B6 y" Y' M2 }4 T/ O0 g4 ~0 ?( g' k- u: L' S5 y1 T
(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) c" y6 d4 ]- Q6 }
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, ^- ^* n! }: X, ]好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 0 i! w8 i- c+ h u
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+ \/ a, O& ]& D% v' }B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 ) ^ x* D% O' h$ c. v3 S ?" R0 {! j
. |/ {$ J9 ^; d K# V) _) RF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
: j4 i' O- V" i3 x4 n4 T( }
5 ^$ Y' \% t% I8 z: O5 B/ ]7 d. P于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?7 w, U: w" [+ [
9 E ]' p: I. D7 h. {7 d ^2 \) a) b+ W! B* x a- }# w+ Q
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
% t, x2 b8 v% K2 c: L) v I; F+ D$ n) P# X# M
1 n, F. a. ~* W4 ZG11=B1*B'=3.15*28.75=90.56 2 f5 r1 ?( P& ^: j4 P- ] i1 _
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G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]0 P% U) x* P; `! y' t! Q z
3 d1 c3 m) m" F; w2 K
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 \
' p. ?$ x% m( a8 R& f: ~# Z6 C* |* h W0 f7 S7 s3 A2 @. G$ i4 x; w+ G( F& z1 y" B" C! g; O# [
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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