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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑4 D; K: l6 P- _
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k5 s$ B4 [* Y* r, E8 s
( f% P8 {# a- k" h* _9 A( t7 L. _
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 }6 L3 ]- y5 a& e: T; \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. [0 B% K, w. y/ j
. l1 v6 Z, a, Q; k( h& t" ]0 @) w! L( u* H% h
" i! x" o! d' h9 A+ K6 ~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! ( x* U4 C% C+ s$ D, ]5 K+ I6 z
7 e6 Z/ _5 C5 S: K8 T8 s
% E5 x, [+ B; }. g; c做下算术了: 2 i( y$ \ W: ~: {8 \" `
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/ e# I( t+ L" x) ~(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n! k. L, R4 Q K1 ?9 ~. q5 \% G
8 t3 n" Q) ^) Z ~0 e" i `
(2)立博: 2.10 3.25 3.00
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# P8 p( t" f& J1 f+ i! [5 [2 ?& \: r(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t$ {( Z1 x- J5 f. a
5 {/ N6 d1 H; L3 _6 P0 m3 K- |' y(4)易胜博:2.25 3.10 2.95 0 U8 a7 e; ]$ \; \$ N
- U+ {+ l. `) m% ~. _
" Q' M3 ]8 V; I9 u5 T! u3 c$ u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 1 r8 f( B+ r' Y* `
5 F8 F, p$ }' ]( i% c
, \( r1 F$ u7 Y+ eS1=2.22 B1=3.15 F1=3.01
9 K9 i* u: r9 O% P
; k/ |8 S2 o8 O3 K QS2=2.10 B2=3.25 F2=3.00 ! w2 ~" k1 H9 P
% ^# T/ X4 W2 j% ] s' x J6 h, ]7 q c/ @
S3=2.20 B3=3.10 F3=2.87 . ?% Y/ `. D3 N5 M, p3 w( F3 t3 S6 x
9 A' e& q. H7 B1 c9 S5 j
+ _- ]: @9 J! y4 e/ dS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \- l9 m) F2 T" i3 ` H' |/ }- Y5 X
8 w( d5 ` _0 H- N/ h7 V4 v
; e3 l/ _; b K# p: \$ K) C1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
' {- i1 g7 ^" E
/ M9 v" U# _1 H1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
+ C. t$ W! k }3 H+ ^! M! C3 ?/ N4 ]. y$ Y) A
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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2 x# P* A3 m6 Y1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
& @5 k! g" y! {4 L9 }! X$ z: G+ x9 Y- y- K6 r
# g! E; ^& Y/ e# F' ^- M, lS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
( x' n6 `1 v: O" s% H9 ]& d/ Q5 ?& N' M; S" q+ \0 U( G: n" e
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
- b4 A. k, {* y9 [+ u, j! ?
+ u' a( M2 u$ v9 ^S1'=41 B1'=29 F1'=30;
# M6 m: _. E j/ g% e8 }# t: H# v' w' w& ]9 T
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
8 E4 h1 ]6 ]' n6 P$ J' }5 I- Z; m' V% T, u, P% O
( z' p* e7 z* J% E D* M2 _, vS3'=40 B3'=29 F3'=31 ; Y/ e5 N3 W$ p- C1 h
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a' O, u2 Z6 v/ }1 [% n- O4 @
S4'=40 B4'=29 F4'=31
g, A+ c8 ^* a% i. H; _# m: B6 y" Y' M2 }4 T/ O0 g4 ~
! S. N! A& I$ M4 Y8 \- N4 g7 q(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. {" C8 y2 l5 Y1 E, t7 @
* R9 Y/ Q" p9 \5 K$ [" M- I1 e x! L
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 % _9 u& w/ D2 Q+ F# t* S
5 t4 u5 L3 {) w' D( I
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
3 X, _" ^ `5 F: A' n# A- e4 x. \! E
5 [9 j$ a8 j T' b" P4 A/ P( P于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?+ K; d. p3 z/ u* ~- s/ q" e
9 E ]' p: I. D7 h. {
8 m+ ]: y ^7 ^7 z I" d/ [ n! |/ z, fG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M) U; j5 i3 n. _6 [( C6 v
+ D$ n) P# X# M
$ `2 j4 m7 ` o+ |4 eG11=B1*B'=3.15*28.75=90.56 5 p* {2 o/ ~4 W. q; I5 F
9 F0 `, Z/ H% a" W: A4 {1 r( n0 R3 ZG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]' `1 i% g0 d6 q$ e* T
7 P) G) _& O! [$ b& p% ?. a
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 \ `+ {+ m, \4 m J$ X1 }- B
6 C* |* h W0 f7 S7 s3 A2 @. G$ i3 p3 H3 y* ?- 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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