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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑( d; r- v. S6 L9 Q
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, Q' h3 S; o$ X1 l# i凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
" D. s _# @; |3 d4 k; v6 E* ~2 e2 J0 J# }- r+ }
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)% V1 }* k1 s- }/ ^8 ?, O
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. [
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+ s/ C8 T' n8 D' t9 j: g' u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! ) v$ N& U4 O }9 f4 U7 w
7 e6 Z/ _5 C5 S: K8 T8 s
7 b d& }* k8 y* C* q b2 |做下算术了: 2 i( y$ \ W: ~: {8 \" `) T" ?' M0 c+ i1 T/ X/ S
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n. c( ?) Q' @3 o( Q" W$ ~$ s. Z+ Z4 ?
1 t/ ~" Y5 x% `' o
(2)立博: 2.10 3.25 3.00 7 |6 [3 C; }- e; K+ h B, V+ Q- p
5 O* t6 \/ H8 \1 E# h, U( A4 M(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
& d8 O7 h# G: ]! E% I- z( ^: R5 w4 |$ U
(4)易胜博:2.25 3.10 2.95 : K* P# g6 w: ]# @- @0 n% u) C
- U+ {+ l. `) m% ~. _+ v/ @2 d# B6 @1 G# m, E
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
; h2 k- u8 k4 E3 C" S4 B: X2 b5 F8 F, p$ }' ]( i% c
7 y2 N& s+ `# x* m( \2 W4 q- `S1=2.22 B1=3.15 F1=3.01 * s! c8 F; J3 }& I1 ]
. T6 ]. e7 g4 P5 u; ^S2=2.10 B2=3.25 F2=3.00
( q5 u* r3 b% I0 S9 h8 t, C% ^# T/ X4 W2 j% ] s2 @- N& t( g8 @: D& K+ ]
S3=2.20 B3=3.10 F3=2.87
' n) ~: X$ F1 g7 t+ \9 A' e& q. H7 B1 c9 S5 j; k* p& `0 O! ~# V% h0 x
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
& F H( E" T4 U/ z+ s3 Q8 w( d5 ` _0 H- N/ h7 V4 v, Q5 \; x$ i6 Q, K2 x. j
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 : c. Z4 @% z4 n- o4 g8 _
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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% l2 t, b, z" _1 R0 l
2 ` I/ v4 z8 G, o3 G" r1/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' q4 b9 y6 c: P4 Z9 S( v
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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
& D1 i# A( \, m ^9 m. [( l: G+ x9 Y- y- K6 r5 y9 R1 [# {2 T; M* H
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
k6 P0 S* }2 r+ ?, g$ w6 C
+ T6 x6 ^* x- c5 X0 r/ x* z0 B2 y5 b类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
. {( R6 K) x$ B: ?7 x2 h
: Y& _3 w0 V( W9 B$ o# i# DS1'=41 B1'=29 F1'=30;
5 B: a7 R, [. c: [4 n6 N7 R$ n; k7 y3 j4 _% _0 Q
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
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7 s! S/ E! e# Y& e1 gS3'=40 B3'=29 F3'=31 % l: h# b3 |4 Q' | k
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
1 r* |' J7 s- p% |6 `( e( XS4'=40 B4'=29 F4'=31
% p7 A' x5 e" A* [3 J: B6 y" Y' M2 }4 T/ O0 g4 ~. U1 T! J. Y& o4 D x. q8 L" b; ~
(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/ M% k: O2 q0 V
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
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) c7 _: W) x$ F8 F5 o6 j' J) F$ TB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 9 Y4 u* W1 G- {# l
1 W, E% f5 n6 c- r& t7 f, eF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
9 I/ R9 \8 _7 U0 N% b7 Q/ ^$ B2 \
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
, h' [2 W8 v+ \* G) ^8 M9 E ]' p: I. D7 h. {& ], a" [* `/ W' [/ ]/ d
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M3 P+ s r: g- w3 \. f
+ D$ n) P# X# M! O8 `) T, W" R$ r+ A
G11=B1*B'=3.15*28.75=90.56 ) |& S7 z4 o, w/ f$ B7 T4 ]# }6 d; {0 @5 e
9 p% E( x$ C" w* {/ ]4 z/ Y
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]) q2 ]0 w' `/ e$ s$ ?. Z/ [: S* K
, @9 j4 ~' W6 y+ @# S! \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 \1 i, H2 M, x; x. J2 Z: Y
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
1 B) t& H3 M5 N6 ?. p4 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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