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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
$ @' J$ W% a D ]1 q6 M* f/ a/ y4 p# R- a1 ^9 v! c
) J" a" w! M- r( g0 c凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
. j1 G8 s' S" b# L& x; |# y- e3 Z5 H6 B+ q K7 i. ]
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)+ g8 ?6 X" D: E7 F; D
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. [' Y2 A4 I, s" \. d: N! F4 p( I8 P
5 |, C, G [$ O; A& t" ]0 @) w! L( u* H% h
+ }) k0 S& z4 ?; Q- S. Q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! * A; ?' i2 ? a+ o' \
7 e6 Z/ _5 C5 S: K8 T8 s# t! p5 c- ?6 [2 d: B3 ^ D7 i
做下算术了: 2 i( y$ \ W: ~: {8 \" `
% ]; V: L! s- m8 s# [; ~' L. y! k5 F, M& W+ d
3 K* H) b% h6 ?(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
9 z0 _1 O4 F) D5 T8 M4 Y: w+ V. t2 d) x$ Q4 y
(2)立博: 2.10 3.25 3.00
& D) y* Z$ j3 @5 s6 O4 j
/ b9 B& S1 \ ?2 l(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
% ]! C9 H& q4 S' v4 K$ i7 w- D ?, H! H: b# b" y' X, Z
(4)易胜博:2.25 3.10 2.95
5 d+ a @. v! @$ T {- V- U+ {+ l. `) m% ~. _
& q% {" Y. P; T8 {/ |6 |/ |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
, j% k" _) u! G9 q5 F8 F, p$ }' ]( i% c
0 I7 n" _" ]5 x, F* k, X, pS1=2.22 B1=3.15 F1=3.01 3 Q. | @7 D9 N: E) R1 g# u- z9 E& \
. e& r7 I7 P) d# P* GS2=2.10 B2=3.25 F2=3.00 0 Y: d( k" G! K1 A: z1 y! Y1 a
% ^# T/ X4 W2 j% ] s9 G4 x/ G3 |; Z- R0 w5 o. U/ R
S3=2.20 B3=3.10 F3=2.87 # r: V7 g* h* ^* }. g0 e
9 A' e& q. H7 B1 c9 S5 j, @ m( G( a3 H3 \) ?+ e" t8 Z
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
% l( d3 F7 G/ Q A8 V8 w( d5 ` _0 H- N/ h7 V4 v
# g$ ?# O e% u6 y0 e# P# a1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
, w7 e) @7 r) L; E& v2 V1 c/ M$ v( D
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" k7 @; z; j+ P2 M0 ~4 R
7 R) c8 j5 C. N M; r3 n1/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
6 p: \9 H, O2 t. \% B$ }
) S) V2 u: q: ]3 }# t1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 ) G8 t' \! @8 j9 ?% O7 y% }
: G+ x9 Y- y- K6 r: A# c; s1 y1 c7 j# B. H
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
, {) [. t5 A. I4 n. J$ T
$ N7 C( `5 p6 b) V" p类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j5 ?: I- _3 `, Q/ W
1 `9 A0 X* A0 F. i! f) GS1'=41 B1'=29 F1'=30;
* p3 |4 D0 k- F) V
( k1 r7 q% Y& \# F% x) m1 s8 E/ uS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
. E' ]4 z( Y/ s; m' V% T, u, P% O8 f7 i) D# }4 ~2 Q2 a4 k1 t
S3'=40 B3'=29 F3'=31
: L$ j' x1 [$ ?6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
8 t$ {0 E8 Q' {S4'=40 B4'=29 F4'=31 7 {* @2 ^" C1 b1 `- f& A! R9 U
: B6 y" Y' M2 }4 T/ O0 g4 ~1 ?6 K% O$ ]" e0 o
(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$ U7 a7 Z9 \4 v6 G: I3 }8 ?
* R9 Y/ Q" p9 \8 t5 O7 o& O5 c* J
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 1 M; V/ y7 \1 Z7 i2 b4 v2 g" z8 m
) q( ], k9 L T& t
) V9 s) O$ p& V1 H4 wB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
* y3 Y: C/ G( d& w9 `7 @$ V
, ?1 P ^+ ^3 |/ P5 H: r3 u h) OF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
# R& @& E& | o- K& c! `7 ~" l! U- L1 ^7 k! V( O
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?3 M7 m8 O/ F6 b1 H
9 E ]' p: I. D7 h. {5 c7 H2 z0 I# o/ [6 @) ]
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M' ~! L: k) d2 u8 [/ N4 y. T+ w
+ D$ n) P# X# M' Y" v3 ?- U6 T: H1 o+ v& G. S4 m
G11=B1*B'=3.15*28.75=90.56 3 W$ X0 z: p! ]
6 [& z; r4 n( O5 AG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]6 Q/ U; |" v8 r* h, O- u1 I
) ^8 X+ C* I$ Q5 x: l9 g# t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 \& |' D) T0 E; T" s a: W9 {9 E5 t
6 C* |* h W0 f7 S7 s3 A2 @. G$ i# g: O c8 |) ^ ] L
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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