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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑5 S9 o; E0 N6 s- M
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
" ]9 |+ y5 |: _* |1 E3 |
. p, k5 m) v9 A: {" |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 `4 f5 z( g8 b
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. [+ R! b; y5 b6 q9 \3 m/ d3 u
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7 N1 `* B7 ~$ \% J! N' W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! % G5 [0 P7 a! g- u1 B
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, z& K+ O! j D3 Y7 Y+ S! q做下算术了: 2 i( y$ \ W: ~: {8 \" `3 u, X( A' M; }
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- w) t I4 O' e3 c) N(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
# ~7 I+ K# {* J% z% q8 I2 c1 W0 }, m' N2 i5 o0 \
(2)立博: 2.10 3.25 3.00 / o( Q1 Z' D/ b( W6 n
2 }& s) w) ^9 k& W$ E( C(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
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z1 i: p1 N+ U* y$ k0 D( C1 H(4)易胜博:2.25 3.10 2.95 ( v) m9 w M/ W* l' r
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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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& i0 g" V) k, r4 t6 XS1=2.22 B1=3.15 F1=3.01
+ A0 U9 r! w9 h
- h' R$ E1 w: v( K2 ^5 x0 MS2=2.10 B2=3.25 F2=3.00
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S3=2.20 B3=3.10 F3=2.87
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0 T% N- h; m9 {5 e/ ES4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
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# P9 X; m A9 Q& d. b1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 2 k/ [, Y/ q3 V5 i! F4 W4 L
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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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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
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% o+ `; ~6 @, c1 u+ f1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
" {7 q) f5 c7 c2 G4 Q7 c% ], h1 b l: G+ x9 Y- y- K6 r, a. D" M; s2 ]7 g4 r% W" ?7 @* f
S1'=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 b1 A* w& J5 J X5 \/ d9 C
9 b! f. B: u/ f3 S A$ k/ v" MS1'=41 B1'=29 F1'=30;
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_' b: @ U, Z8 H8 e# y) lS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s- D% u" C R; |9 V% Z& P
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" K( n% o% i3 z a: e% CS3'=40 B3'=29 F3'=31 . k d* ], @+ o
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0 r7 t+ d5 H b# w; NS4'=40 B4'=29 F4'=31
. M' X, o3 o' L; T: B6 y" Y' M2 }4 T/ O0 g4 ~1 g7 [) U ?9 z1 Z5 v: a$ s( T, V
(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
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
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+ j" k' d; R: X- o9 V1 [" ~6 V于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?6 O+ y( x5 |% Y" B9 p5 J
9 E ]' p: I. D7 h. {& s c; U. w) c+ L; K
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
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G11=B1*B'=3.15*28.75=90.56
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. T. @; N5 a3 j6 H3 w0 c! [, AG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
8 b. w* a+ L" ]$ N: u: \% t' x1 z" E3 F% [; i
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% T, q V1 o7 W% y5 O# k6 i
6 C* |* h W0 f7 S7 s3 A2 @. G$ i1 D( I$ C8 ^( E2 h4 L) 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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