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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
& Q' Y+ m5 E/ k; I; p3 U* f/ a/ y4 p# R- a1 ^9 v! c
5 Y9 n+ d5 n& M2 z! }+ m0 v凯利指数的计算方法: ( O1 m2 a L3 d; F& D k9 k7 P% S$ z/ J5 k6 t
% W5 o$ p! ~$ XG3=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 N- [5 }1 i- Q* 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. [: f; A+ d( \# {3 G1 l% W, n
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& t" ]0 @) w! L( u* H% h
# }7 V4 A2 }% y; a- e! q! T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!
# Q5 D; r& a" e' M: t9 |( ^# z7 e6 Z/ _5 C5 S: K8 T8 s6 n' N7 I& E6 d
做下算术了: 2 i( y$ \ W: ~: {8 \" `
' M4 t# e4 w. z; ~' L. y! k5 F, M& W+ d
3 W* \' c+ J: P2 ~(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n- F% U1 V# x5 |4 U
# E% J t" A, ~7 K/ B2 p
(2)立博: 2.10 3.25 3.00
. X6 @4 J. s9 q4 }% O4 \: m- q7 ~1 H5 x, k$ e3 _
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
' r) S8 Z1 l D: z$ t. f
' l" v) c; G# M4 \- d8 p3 p5 f(4)易胜博:2.25 3.10 2.95 " w5 J* I, f2 C; [4 s1 W+ d- z
- U+ {+ l. `) m% ~. _
! j/ c9 U6 ~! K- E4 j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
: S4 J7 e6 u: M. V5 F8 F, p$ }' ]( i% c
: }% P8 z8 k% B$ I9 mS1=2.22 B1=3.15 F1=3.01
) @) X9 F N7 O4 G7 C! V. ]6 q
3 z' R5 g" S+ C2 I; S( YS2=2.10 B2=3.25 F2=3.00
6 b0 {1 G v8 Z& |) y% ^# T/ X4 W2 j% ] s2 f+ S; {# H% A7 n: p# ?& ?
S3=2.20 B3=3.10 F3=2.87 1 \7 V/ M" `' x9 y, \' I& s7 E0 r" M& v
9 A' e& q. H7 B1 c9 S5 j/ E* I, r, Z6 v! v9 I* N& a
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
- M( s( L; S0 G4 b- F8 w( d5 ` _0 H- N/ h7 V4 v
( ^5 f$ J/ \/ g, K6 l1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 ( s0 Z8 f7 a4 I. o9 M' b
* Y: m/ j" k$ ?! ^9 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
3 Y$ ~9 @: S; `, T: d0 E
0 e6 x \0 U( n# l& r* D8 `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
1 g/ ]+ \$ S i- D( R
$ ?- c) b, v" ?* p' J: P/ D1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
& f. `1 P! W' Q5 G8 e' \2 _! J0 K% e7 Q$ M; p: G+ x9 Y- y- K6 r* E, ?% ?0 r3 ?
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T p. v# Q: W1 z4 s8 r5 d: s; \7 s
0 i# `8 u- m0 E2 _
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j( }) q" c) I0 y8 i
' ~5 w7 I6 |! x& u0 X; {- XS1'=41 B1'=29 F1'=30; + R/ \% F- f% |
# K+ i+ B4 z& I( _% y' z5 N
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
+ h2 O& G$ @" y6 E" ^3 A; m' V% T, u, P% O
% c8 A" S$ |# n. S8 C. }! SS3'=40 B3'=29 F3'=31
: V4 i+ l3 \1 W j0 ^ n6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a" ?6 ^# p }3 X3 M& ?
S4'=40 B4'=29 F4'=31
$ N4 i6 B% z# h: ?. Q: B6 y" Y' M2 }4 T/ O0 g4 ~3 T- p+ a' g9 @9 U$ I+ ~
(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" _- ^% ~- u& R
* R9 Y/ Q" p9 \
% @! g( A( s( B, E" p/ \4 H好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 # V5 |" I3 s4 a
) q( ], k9 L T& t
6 }$ v% b4 ?7 VB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 ! v# S. |4 C( }$ t( |
8 ~& C) b. W' z, V
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 ' ?3 B1 P' E% p% e/ m+ A
4 x! D0 E4 s4 B7 z$ M
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
1 ?; ]- O y. S) x, o9 E ]' p: I. D7 h. {" q$ K0 n. F" @' ?5 [
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M: o- s( |4 G( j3 B0 N
+ D$ n) P# X# M
' \ d$ t( |0 e7 rG11=B1*B'=3.15*28.75=90.56
/ ~; d3 Z K, z+ @% \* {7 d0 L: S/ B* z2 B/ o
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
J; z P8 l4 i& F' [6 O
( [% a- \" [! 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 \% e1 k$ @+ f) l. y
6 C* |* h W0 f7 S7 s3 A2 @. G$ i% n, B: P& B6 k" t9 f2 h6 F6 k
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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