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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑& K- G2 W5 H% g! [+ {
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k# O3 p% U D( ^# z: m% M
1 L" {- ?" f* }/ C- u8 u3 L9 X2 OG3=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)
) ] R$ C T& ?2 i! 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. [
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& t" ]0 @) w! L( u* H% h
$ Y9 r, T. ?- ~1 C( g1 w" |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!
8 t4 _! f7 g) b, s, u: [ G7 e6 Z/ _5 C5 S: K8 T8 s# J; {2 Q8 [) K. b7 I
做下算术了: 2 i( y$ \ W: ~: {8 \" `
7 F( X- @' f& C. o- k; ~' L. y! k5 F, M& W+ d. d. ]) e E+ y3 i8 x9 o
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
; M$ _! Y0 g b: T% H
5 v# t( `+ Q; S4 r. D(2)立博: 2.10 3.25 3.00 5 V' K7 D; n7 o8 a
! S# X% |) X5 t0 P- O7 f' B/ L S9 u+ ](3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t# m' R: c) T' n- L* A' j
9 W, V+ w2 W; z- w% I! {& ^(4)易胜博:2.25 3.10 2.95
" Z+ A [: N: ?9 H: Z- U+ {+ l. `) m% ~. _
9 [% Z9 x6 e* o3 x: K& ^' ?3 B7 k4 V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
( V0 k' F; C9 K5 y# h5 F8 F, p$ }' ]( i% c
$ l- m% s8 l3 c) G7 w/ `9 X# ?S1=2.22 B1=3.15 F1=3.01 . ?$ S' K; S' ^5 p6 m& a& v
3 I2 ^9 W$ N/ w' z$ [1 L. L6 U, m0 _
S2=2.10 B2=3.25 F2=3.00 & m' ^+ x. u. I# {& i$ ^" q/ ~
% ^# T/ X4 W2 j% ] s
! j" I; y' P0 F! q p8 h0 j. e$ h& vS3=2.20 B3=3.10 F3=2.87
+ _* e1 O$ @( Y# }8 w9 ~9 A' e& q. H7 B1 c9 S5 j
9 u1 J$ } g8 _7 zS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
; @5 Z( S/ h/ S4 o. K/ T8 w( d5 ` _0 H- N/ h7 V4 v. ~, B: B2 _# m6 g8 Y" b8 G( Q+ Z
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
L a1 w9 S) ?' h7 |- }
# r* N- ]6 n% V! q+ ]+ a1/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 p8 Y! K G% {
% p4 T6 `4 g3 L% U( H1/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' q9 O% C3 p: R: H+ ]
1 j$ G0 n2 P& D+ a& _: T! \1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
. R" @$ e5 t% h' Q' j5 P: G+ x9 Y- y- K6 r
. ]1 N! f/ `' A8 Y! D' o7 qS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T4 g' c/ {6 c9 L8 m! g
5 V* D3 L# Q( ^3 |类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j" f4 }: n3 q9 @8 H# e; ]- [4 g
: @! D5 U( ~1 b9 P# _' ^" W4 z3 uS1'=41 B1'=29 F1'=30; . l0 M6 e" ]3 m. r
; {6 l, s' f1 Q4 s+ |/ O5 R% l
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
5 @& M4 W* }/ t0 G; m' V% T, u, P% O9 I7 d% x# t1 g4 P. [ F
S3'=40 B3'=29 F3'=31
* H6 X1 }2 ]' R0 b5 K6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
- P4 n% E/ A i S! RS4'=40 B4'=29 F4'=31
, e+ R; h0 G. ^ F+ f3 z6 v% j: B6 y" Y' M2 }4 T/ O0 g4 ~0 u0 E8 J1 `: v& ^) B4 R! X
(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
1 A5 G3 o$ t; ]0 P* R9 Y/ Q" p9 \
. V) v6 S7 K- b$ k: d好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 & U# D. Q! E. d$ {: E
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) K: Z S }/ \% [* a* g- TB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 2 x- u/ M' G4 a% y+ ?9 e) G* g5 a
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 + D6 Q6 A; [" p; t( m6 L
/ K: u& Q# X( I1 n2 L% j于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?2 o; C- v! a# h6 r# X3 w
9 E ]' p: I. D7 h. {
3 j5 f" H6 d/ J! J; d9 C. QG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
* I4 `0 b. f5 |, @/ E+ D$ n) P# X# M# G1 q! q! ]- U+ Z
G11=B1*B'=3.15*28.75=90.56
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4 i l' S) B# l! w" U9 yG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]" P& b4 M `$ s% I. i: b- V
. x* T X: l7 C2 L) G L, K# s. c/ c
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 \
4 E& b1 c9 r+ `* I! S& v/ G; C6 C* |* h W0 f7 S7 s3 A2 @. G$ i
) ]7 ~5 j3 S- ^+ c' T; ~) B/ A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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