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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
+ g+ p9 @7 M2 C% f7 H* f/ a/ y4 p# R- a1 ^9 v! c2 P( b* `4 R) f' g/ W
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
_; x$ x( d J; u
# @7 P1 N4 P1 s G8 {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)
4 h8 i* x; D' r! u1 Q5 b3 v" I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 Z0 Z1 \% @7 W
: I3 B* ?" O7 M- I0 E& D& t" ]0 @) w! L( u* H% h
, \, p/ D( u' v! o' x6 l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!
1 Z& p# f7 s8 ]- @1 Y+ O7 e6 Z/ _5 C5 S: K8 T8 s5 U( o$ A1 Y$ G7 F; [& u* C
做下算术了: 2 i( y$ \ W: ~: {8 \" `0 s: v, J! z$ a# K: r
; ~' L. y! k5 F, M& W+ d
" x9 ^; [: l7 O t6 U6 j(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
t7 e: s* d' i# u' V! c3 s6 v; L* {4 T$ V0 q, y f1 W
(2)立博: 2.10 3.25 3.00 2 A- {& e/ v/ i0 G/ m/ U6 j0 i/ d
( k: |2 p& ]# A(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
7 | C2 R8 A F( }1 l! Z9 P2 X. x- ]
6 T K' e, K' p \$ v& ~(4)易胜博:2.25 3.10 2.95 ' T6 E% ?: {6 M" Y3 g* E# t
- U+ {+ l. `) m% ~. _
5 l) h. C' T4 B! @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 5 H3 N4 m0 y: ^9 @$ C+ `
5 F8 F, p$ }' ]( i% c
3 }' A) D+ M6 c7 K' \0 yS1=2.22 B1=3.15 F1=3.01 " z9 Q- y0 s! j/ F$ \) E$ Z+ b
. G: @5 f' A4 c* x/ L4 {8 D xS2=2.10 B2=3.25 F2=3.00 & [+ B. m3 W& n$ l$ G
% ^# T/ X4 W2 j% ] s7 y1 {- ?0 a. ~$ B6 F) N5 a' N
S3=2.20 B3=3.10 F3=2.87
, H5 [1 B7 S. T6 z3 C9 A' e& q. H7 B1 c9 S5 j
$ O6 o) S j0 M' Q& {; mS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \5 k) H" w+ I( a( h1 i- n
8 w( d5 ` _0 H- N/ h7 V4 v+ O8 T& G0 b) \! n9 y: M( Z, J
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
5 ]# [7 i6 K+ s5 l) B+ [0 g1 B* Y8 ^! x+ O2 m7 B3 R
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! `8 \7 T7 p" V
) ]$ I2 e" C; e/ n7 ?% P1 y
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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) \* ?, s4 ]) n. y4 q9 p, I1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 1 P! I' o# D* v' p
: G+ x9 Y- y- K6 r
% n- }1 H" W, R: K( lS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T' i' d7 s0 l" V) `6 z, g' M
# N5 K- w5 h, z
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
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3 j; m, c! Z8 C. Y3 e) P" XS1'=41 B1'=29 F1'=30; " x6 b5 x9 `4 O" l9 n( _+ N4 N @
6 z0 y8 Z' M" b
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
/ O4 z3 |, K8 a; I0 e; m' V% T, u, P% O8 a( q7 q4 t& F. I3 A1 J
S3'=40 B3'=29 F3'=31
( Q( D- V8 e j/ |4 z1 S; [$ k" N! S; _6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a$ g& s" }+ ]/ H& L8 J# w' d. ?
S4'=40 B4'=29 F4'=31 3 p" C' W% h* ~2 e. ^! b/ z
: B6 y" Y' M2 }4 T/ O0 g4 ~+ X: d+ Y$ I# p2 @1 p+ U% 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
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) W$ a2 O# W- b: o( _好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ( S; F. r1 C( J' w
) q( ], k9 L T& t( k1 C5 w1 i6 t+ a, }* G2 G+ H
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 $ U( ?& l6 ~9 i- w& R; e
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 3 _$ ?( v$ c0 @0 V9 M4 |% [
$ b# X! q8 W& Y于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
9 B* i) {4 W- _7 n0 u+ d3 Z" m: ^9 E ]' p: I. D7 h. {% _% V5 R8 e) D# W: |% }
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
O% \3 \; U* ~+ D$ n) P# X# M
# ^$ i, y; ~, o. ?G11=B1*B'=3.15*28.75=90.56
+ O9 c, q1 c! T# l9 ^# q+ c# \5 s7 @# E
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
: O5 n. A9 T2 B6 j0 y, G$ @2 o
: C7 B# Y8 b$ ^0 w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 \+ B9 g" Z$ f" p2 q K
6 C* |* h W0 f7 S7 s3 A2 @. G$ i( v: T2 q1 c0 B$ B- _1 ?. V# a' a$ b
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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