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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
5 P+ t: p# c A' Q* f/ a/ y4 p# R- a1 ^9 v! c, F* q: D9 h6 _2 X. ?3 Z) Q
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
6 C8 C3 Q& g% f5 y$ I8 n G, \' C5 H r
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) w1 F, z; ~) j* |! k! L
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 i) b/ Q+ k s3 ~: E2 `# }
4 v% \1 }9 d( _ }5 a& t" ]0 @) w! L( u* H% h
) S2 D, E4 Y* y$ R7 ? @) \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! y' Z- Z4 F* @9 j; Q
7 e6 Z/ _5 C5 S: K8 T8 s/ x$ i; n& I( \7 F. g, J
做下算术了: 2 i( y$ \ W: ~: {8 \" `4 n( [3 X+ U4 `
; ~' L. y! k5 F, M& W+ d
# J! `% R$ D' ~5 b, H(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n! q# W7 Z' N) D2 `) |! {+ P( V
1 U2 e- ~0 E6 e; s1 N' e
(2)立博: 2.10 3.25 3.00
/ g1 [, S: M) E5 G$ F( T* D
7 \+ e" E) V# x(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
$ J1 q, N N) P" k" u6 ?
+ ?; u9 X' Y* }3 w# p1 l' `2 N(4)易胜博:2.25 3.10 2.95
+ P Y5 s8 Y; Z1 I+ J- U+ {+ l. `) m% ~. _
1 ^$ A* I& J* z3 D2 e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 _7 Z( L+ @9 o2 v5 z9 n+ e5 F8 F, p$ }' ]( i% c
# `, ]0 s/ |! n* r* ]5 l# FS1=2.22 B1=3.15 F1=3.01
* c( F* {! X& x2 T/ U7 I
+ p+ r" Q! W/ _0 Y& \& s+ aS2=2.10 B2=3.25 F2=3.00
% e$ o8 [3 ?: M) {8 D/ \7 C% ^# T/ X4 W2 j% ] s3 q# K2 V( k6 }5 m
S3=2.20 B3=3.10 F3=2.87
. B/ r+ H8 b& H$ z; A% Z9 A' e& q. H7 B1 c9 S5 j; i5 \; ], h6 i* f. f5 n6 l+ [# c( d
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \( |& x4 Y" k. O4 a+ g0 e& E. B. Y
8 w( d5 ` _0 H- N/ h7 V4 v
. S% a4 y" l% z( H8 g1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
: l& l& {* E5 W& l/ b. ]
3 T' {, H, t5 k3 s1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l0 M* E, R E& A9 D% o% C
# R3 _. q7 ]* j$ }! E+ Z7 w
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
2 h/ x, G6 s; @+ A: k3 i, U2 F. p$ w7 E9 t" f5 l
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 % o3 J& ~# K3 W& ~8 e5 |4 n
: G+ x9 Y- y- K6 r2 u3 N1 L+ \7 y& M7 n
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
& W( U2 z1 A8 ?% T& e
2 S7 v$ ?2 f6 F1 g3 @类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j# Z' i/ U! [1 i# h' c- J4 a% F, ]
2 o/ h3 o6 B5 l w
S1'=41 B1'=29 F1'=30;
* L0 b, A! X: Q8 E) p% C, m
% g4 H' K. c! Z' r, ^8 S" F3 cS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s" m! f8 H/ z) ~
; m' V% T, u, P% O
( k- `4 Y* {9 BS3'=40 B3'=29 F3'=31 , ]- O! R3 g* }6 G4 k
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a/ T$ Z9 a2 }. O; D" M
S4'=40 B4'=29 F4'=31
- u1 }$ w4 Z& C$ p# x: B6 y" Y' M2 }4 T/ O0 g4 ~
" `1 D" A/ u; W4 |1 B(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
+ V" ^; m! q: @/ @! j. {# s, K* R9 Y/ Q" p9 \, m6 E$ g" ` X( _. r. Z
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ' N, i# v) B1 V- ?! E1 c% M/ e
) q( ], k9 L T& t
y* S0 ]& Q$ v# SB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 7 |, M$ s# Z' b4 j u% r0 d
# X& b o V! ]0 ^# f* T1 ZF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 + g" T2 W# _0 M6 r
) j+ y) T$ Y% _: V2 Z0 y
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
- ?( }" n, v S; u' ]+ p9 E ]' p: I. D7 h. {
3 u: ]# l+ Q% e2 P+ rG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M1 {5 ~' G9 @" H7 y& \
+ D$ n) P# X# M' q5 a& b6 A# f- o
G11=B1*B'=3.15*28.75=90.56
7 k J7 R0 y$ J; S: l. S+ k$ |7 f% w; E; E. |
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]! X2 F& H' ~* U9 s- n( Y; e# c
) J* c* `' f' h- }; z. z, |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 \
- n3 y r, L- r k1 z6 C* |* h W0 f7 S7 s3 A2 @. G$ i% B0 p( P8 V$ u4 F4 i6 T
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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