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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑. ]8 x1 E2 ~1 B( Y
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
# W8 o& U5 ^9 v8 s3 Y2 k- J( @% q+ z1 T
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)
/ L- p1 \* F( ~ u4 D7 X; q# `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. [8 x2 G, ]% \) E' _
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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! / F- p4 r7 \+ z$ ^, {. w% h: }
7 e6 Z/ _5 C5 S: K8 T8 s
6 ^8 T0 e' ^. j- ?- R+ z做下算术了: 2 i( y$ \ W: ~: {8 \" `+ s$ i8 Q% H) [4 ^
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n* c9 w' C6 y* E1 I0 p
2 b5 ~1 W$ B# D' d) X. \6 N5 l(2)立博: 2.10 3.25 3.00 % o, v2 |* C0 a/ h- V
5 w0 f) |' h" C(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
; N# w5 Q+ I% B' F. q* V& F% Z4 T
(4)易胜博:2.25 3.10 2.95 7 ]2 h6 e9 O' N
- U+ {+ l. `) m% ~. _; ?! i2 ~ l8 [: ~6 _
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
% l! x& ?; Y6 E* L# j* {2 g; l5 F8 F, p$ }' ]( i% c
; ?. V$ ~* A( ?1 R8 bS1=2.22 B1=3.15 F1=3.01
+ O7 [: H2 Z+ ]9 l: I# g3 f8 W( k+ r U
S2=2.10 B2=3.25 F2=3.00
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/ y$ n' ~' R j. C) u) T/ XS3=2.20 B3=3.10 F3=2.87
& ?3 g5 I! Z6 j) D. }9 A' e& q. H7 B1 c9 S5 j, K+ [/ W/ M3 E7 F: h3 ?
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
4 s$ s* W9 t! m1 m; s5 U! B8 w( d5 ` _0 H- N/ h7 V4 v, e ]9 s ~8 B3 R# o# l/ q3 C. R
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 o9 Q. c4 m; H; @7 }9 E
9 y# a$ ]2 G8 c0 E( S6 V0 d2 f* n+ p1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l' @! i r `' H
) w& h$ Q$ M/ \* B& P1/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
0 o- k8 U' |2 l
0 ?8 k: u! _% `& j7 ^1 N, ^1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 8 q, T" n- ^, E& g
: G+ x9 Y- y- K6 r/ `" Z: e) K* C5 t9 H t9 k' M1 p, U
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T9 }# j( E" g7 H2 H( V; H
; z) S; g% N! ^
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
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F# f1 b3 s/ Y: I1 K/ pS1'=41 B1'=29 F1'=30;
2 _/ w5 x" E" p& d; t# t$ J6 t9 ]) k8 }% x) z2 S7 P
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s0 ^5 O4 b9 M) r1 Z, S4 ^# ^
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S3'=40 B3'=29 F3'=31
: E( Y' _) ?! G6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
: d+ E# c3 D; U! o5 u5 tS4'=40 B4'=29 F4'=31
% V Q0 o# P: I: B6 y" Y' M2 }4 T/ O0 g4 ~6 }; D$ E8 g; e7 K; f$ x
(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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) j8 A" s% t+ @# UB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 2 H5 V e) S9 ]; u: k
$ J X4 y8 b$ w! S: a% E* G2 j
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 $ g4 J# G. @ a' z% P
7 h) A9 R1 e9 O* v- N- g于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
, i) e5 Y$ l: _9 E ]' p: I. D7 h. {% v3 |8 D8 o/ C4 U# |- `
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M$ I+ L+ M, e0 x' t/ g
+ D$ n) P# X# M' y8 W5 ]" o2 I5 _) M
G11=B1*B'=3.15*28.75=90.56
* S( E: D% M' k, l8 X8 C" M, i6 x5 K' o% L
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]: d9 H3 {! s/ F# y& n
2 q2 D0 M5 u/ F) t
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 ~: I6 g0 R+ o0 m1 z* o
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
/ E9 Q7 m' V& f# b% V6 t# P ]* 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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