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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑+ H2 |4 x+ g) R3 z( k' n
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1 M' p5 |$ t! F$ s: D3 F4 J) P* A凯利指数的计算方法: ( O1 m2 a L3 d; F& D k( E& K& ?# v' N( i1 ]% c+ L" @
' @9 ~ ?, w1 I; L, J \0 {' `& h
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)
/ w: L0 Q% t/ h/ K: }0 D8 h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. [4 h- V1 ~0 F# \; l W( z+ i" H
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& t" ]0 @) w! L( u* H% h) q0 G0 \/ N1 E; A
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!
, J0 b" @/ i5 n' @- q% ]0 k) d7 e6 Z/ _5 C5 S: K8 T8 s! j+ a9 x! Y. q) B# U7 i( A5 J
做下算术了: 2 i( y$ \ W: ~: {8 \" `' @2 G3 @) y& p# N& E! J: z7 C4 W
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n4 l4 m4 v* \0 p" K! k
: Y7 x3 s, @6 E- B$ D
(2)立博: 2.10 3.25 3.00 O1 D! T- e1 g$ g' V# j' o- k' ]3 z/ _
2 T/ M7 }6 j4 N; T. h& s(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
5 c0 N& v1 Q6 |/ L5 A2 O0 B; w/ J7 p6 k/ ~: e8 p& |( d6 U) h; y7 i2 r
(4)易胜博:2.25 3.10 2.95 : |3 v" J' D) [* @3 X7 j
- U+ {+ l. `) m% ~. _: L k! H- i, {6 G7 P" m: p/ h
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 ' f! I, {$ _2 G, }/ d5 x
5 F8 F, p$ }' ]( i% c
% c) L8 `" U/ i% m1 YS1=2.22 B1=3.15 F1=3.01 " j3 k# U' b" ` M, f
+ I- [, x) {8 E- E' S) T$ v
S2=2.10 B2=3.25 F2=3.00 & i" A; @; {/ }% k: A. `* O Y& ]* r
% ^# T/ X4 W2 j% ] s1 d& w* o; f5 z4 L, u8 f0 {
S3=2.20 B3=3.10 F3=2.87 5 I5 [4 E' n- G* _' C
9 A' e& q. H7 B1 c9 S5 j
* S8 A/ L* a0 X* K# W: XS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \5 @/ @: \& R: k
8 w( d5 ` _0 H- N/ h7 V4 v8 f% Q4 x0 V' f# k8 l
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
" e, ~7 Q! Z( h
) K8 [& A3 m5 J# y: \0 z2 G) [+ y: 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; U# d! k# ]5 a2 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+ E( q# P' |9 I" T |' J
5 q. J1 @; L, w4 D+ n3 }
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 - {/ C3 l; R7 W; g% q) L0 H
: G+ x9 Y- y- K6 r
0 C2 p* s! @0 x7 y* `0 KS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
+ T0 j @: D) U: w; T
" k- I! V$ [7 X8 k7 `9 Y类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j; \- m, O5 F- V* A& f: [' d) \
- \; u. }# ?* Y. ~& T% n
S1'=41 B1'=29 F1'=30;
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S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s- j6 W% l; f1 Q# r8 v
; m' V% T, u, P% O0 Z0 e4 v; r# v7 N" ]
S3'=40 B3'=29 F3'=31
, d8 l! L4 [, e: @9 l6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
8 L" s. w$ w4 F5 k. J" O3 mS4'=40 B4'=29 F4'=31 ' \$ L) s) Y1 U* a) y) | B O
: B6 y" Y' M2 }4 T/ O0 g4 ~ }1 Y/ G4 p* r. |9 T5 m/ e
(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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6 R. y5 ^4 ]5 I7 N# O. }) h: v好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 5 S# T7 h8 d+ r' a# D
) q( ], k9 L T& t z$ L3 I* F W& f: g& O
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
9 l# [) g( _" p$ A& M5 h3 M2 s; J3 ?, V- P7 x8 }
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
+ h7 u( d, N4 l4 x. P$ J5 ^* v; K( t
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
; N4 M- e& _9 q9 p5 ^' d9 E ]' p: I. D7 h. {
7 o! B9 _# [* A0 JG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M. m3 f- ]! W. I9 f7 ~8 V) P
+ D$ n) P# X# M0 R' T b% }2 l: l
G11=B1*B'=3.15*28.75=90.56 2 U% ^6 }1 Q' H: X! g, p
0 m; Z& Z2 | J$ QG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]8 q. u6 U) G8 L( g6 [9 j
1 C }' j, E% r9 J" 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 \, u" L2 }! _9 V6 X1 S& Y
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
' V9 v* n: X6 w7 f# m1 h, |. q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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