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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑) {7 x( s2 Q) v6 ~% I9 U2 Z
* f/ a/ y4 p# R- a1 ^9 v! c0 Y" H' e0 o: U) K! o8 T4 ~) m. [
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
7 \$ e9 O+ M1 R+ V0 M/ M
3 l. }3 b1 m; A Y5 H4 h; JG3=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)
! ^2 `- N1 X! m& c) 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. [3 Z) R. U5 }. B. |2 X
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& t" ]0 @) w! L( u* H% h
2 b* g5 s4 l( _1 f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! * [# A3 I* ~7 ~1 T n c
7 e6 Z/ _5 C5 S: K8 T8 s
6 {0 V; U7 X6 G) ~" [/ f& g2 H: m, I做下算术了: 2 i( y$ \ W: ~: {8 \" `" f+ Z! n8 p8 m& z+ j7 i
; ~' L. y! k5 F, M& W+ d
9 H7 T0 x# p3 j4 N(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n- p% C6 `; ]5 q3 `( L o; j
6 w$ E4 b7 Y! ~. P5 f( L& ?
(2)立博: 2.10 3.25 3.00 , e! C \# I6 }/ C9 `8 \
! [9 p7 o6 o5 Y; J% _7 M, V
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t0 ?, J1 S9 p! M6 T! C, @
2 t; u q. I u2 q" @
(4)易胜博:2.25 3.10 2.95 / Y4 k, t" y- ?! N1 h. k$ I% s
- U+ {+ l. `) m% ~. _- B( i* I% b5 G+ J) O. S# o1 F
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 + t: x) D. I( N( W
5 F8 F, p$ }' ]( i% c
) j8 C0 j1 O+ |# JS1=2.22 B1=3.15 F1=3.01
- T z* q: \8 }8 p
' k: O$ M! s5 K/ H% \7 PS2=2.10 B2=3.25 F2=3.00
: h2 t9 \2 z4 ~6 o6 h4 t f% ^# T/ X4 W2 j% ] s
# j3 Y8 n& Q3 c- n8 WS3=2.20 B3=3.10 F3=2.87
1 m' U- n8 V$ E' l' P$ g9 A' e& q. H7 B1 c9 S5 j5 C5 G1 @* U5 W ~' j( [
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
+ g/ k) o: R8 \4 \, l8 w( d5 ` _0 H- N/ h7 V4 v
. K: S6 z+ t6 ?- y1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 4 L c0 v3 v( Z8 m
5 G, K* [6 X/ C8 f7 Z1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% 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; I- S: x" J8 x# ^) g4 ~
% x( s* n, c% V$ t: N- A4 w# e
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
$ X' h0 q, Z: ^: G+ x9 Y- y- K6 r
5 [/ E( ^0 A" J9 B6 US1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
: d& R% G" ]5 u8 r5 z9 n, l/ K4 U5 K5 k3 I' f6 O) m' X: E W5 g
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j$ s0 X- M2 l U* }- a5 X. K" K
" W3 F4 d" b0 }9 i1 U a. k- }" t
S1'=41 B1'=29 F1'=30;
8 w0 S5 \- g& m) K% r( I6 n( ~( u+ v1 O3 Q* U$ d. p
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s' P8 L4 n# |1 Y: `, P" Y% {2 W
; m' V% T, u, P% O4 t8 f O& B* a) N5 S% n
S3'=40 B3'=29 F3'=31
! W2 ]- A8 T- D3 n. L1 A0 Y6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
3 M: b$ ~, b( _, X& \3 MS4'=40 B4'=29 F4'=31
+ T( W( P0 c$ T; t4 ^; }( u: B6 y" Y' M2 }4 T/ O0 g4 ~
& G4 u2 O) @% ^ y0 c9 d- Y(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# @ j0 b7 o! u+ d
* R9 Y/ Q" p9 \
' J8 v/ d3 ^, {6 R1 a+ C好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
) }$ w% S9 i7 c) s$ z) q( ], k9 L T& t
: m) \/ d. J' C0 n* {3 ?# ?B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 # F8 b9 e0 f+ ?7 D
/ J) S& k8 T. x
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
, l6 ^0 v; S6 e6 ~# K8 ^$ S/ H, b( s G; ?# g% W7 _( p1 |# q
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?7 a# J1 G) J+ W9 |7 T0 M3 @' W
9 E ]' p: I. D7 h. {
1 X9 R4 V5 W& a* F v8 N5 UG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M# P7 a8 s* E8 S& U4 H
+ D$ n) P# X# M
: ~, G0 t- }8 ^+ v. IG11=B1*B'=3.15*28.75=90.56
2 e. }; e: F' p b9 v' Q6 x9 k1 |8 T- @
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
" |+ ~- Y) E% j |# b7 R# T {: y; Q( G! [4 O
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 \
! J7 M' _( I# J7 {" g8 W6 C* |* h W0 f7 S7 s3 A2 @. G$ i
0 n3 e. ^& ^$ 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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