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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑1 [ D, Y8 g. C
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# a* ]! g0 l0 X6 a; G* c9 A$ s凯利指数的计算方法: ( O1 m2 a L3 d; F& D k4 R7 Y5 {: z' {6 [, M% O% N3 o
% C1 N# i, o3 \+ V
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)+ n; `5 n, e: T3 e6 F
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. [
" j, o: x4 I' L3 O6 Q! ]7 i* k1 ?* D% q8 [ T
& t" ]0 @) w! L( u* H% h( J% j' K) t9 \3 u
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- S" m3 B8 r0 C; U) H
7 e6 Z/ _5 C5 S: K8 T8 s% c. {; C% ]- x$ ]) v, L
做下算术了: 2 i( y$ \ W: ~: {8 \" `- x, Q' g' z# C0 n6 s
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1 F1 {6 ?0 g, H6 U/ l. [(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n% W3 [# j1 T4 u1 F H% q- x
1 F: h8 \. F4 W. L(2)立博: 2.10 3.25 3.00
: A4 N+ f c+ f5 H" G1 Q* x
8 v- Z- R5 {7 J(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
5 b7 \1 z, ]/ u. `* b) t4 v- x+ @& @0 @6 a( h
(4)易胜博:2.25 3.10 2.95 : R6 T" W+ i* W
- U+ {+ l. `) m% ~. _
5 P1 L; c. s. 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 : d5 F3 G% R) D( [. V, {
5 F8 F, p$ }' ]( i% c- x+ Z8 j- m# ^/ y4 \' J
S1=2.22 B1=3.15 F1=3.01
8 K K, ^# w8 J3 @" _8 }5 W- L7 _- R! \
S2=2.10 B2=3.25 F2=3.00
`1 x8 c' m% Q+ P( U3 t! v% ^# T/ X4 W2 j% ] s
. r# ^4 z3 C* h/ v' y2 WS3=2.20 B3=3.10 F3=2.87 % x& H4 o1 A3 o3 {1 `. N
9 A' e& q. H7 B1 c9 S5 j
7 H0 u. S D& o e( S4 a( LS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
! e! r# w# ^) f8 V- _2 k8 w( d5 ` _0 H- N/ h7 V4 v! ~& W' S" E& {# v7 q# _
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
; n: A) B, f* f- ^) Z0 S8 E& A' z8 G7 N$ F+ ?4 L0 {% r
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
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% X' K8 J( ]& o; X1/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
! P1 u6 f3 h$ m2 k
9 \- d; R4 } U8 L+ S2 f1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 4 z/ L0 D0 w }3 P. a5 z( ^" Q
: G+ x9 Y- y- K6 r
) M& H* T3 H* t: k# D# s4 ^- h! |S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T7 |: ], m1 {. e0 O9 P, L J
, A2 m2 ~4 g: f: f1 w6 L
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j5 G3 q# ` O6 V+ C
: p/ J" Y A1 c7 @- n/ s; fS1'=41 B1'=29 F1'=30; ) O: H/ H7 m% o- F) P+ v( d
2 p' l+ M8 H# ]8 _8 n! V: WS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
2 M' J# x4 b& ]) X0 u6 \4 o; m' V% T, u, P% O
: i+ g W1 K5 D1 M( A7 BS3'=40 B3'=29 F3'=31 6 {. g0 d* q4 q3 ~& A, m
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a- n4 a) G: _7 @: i( Z; s+ R
S4'=40 B4'=29 F4'=31
4 y1 u) ~# h" _6 c6 r1 R1 g( V: B6 y" Y' M2 }4 T/ O0 g4 ~
( o) o- o$ |9 i) }2 Q# L: N(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
% B/ U& I; y5 T/ H* R9 Y/ Q" p9 \
/ s1 n$ H- T) |: T1 U5 n# k: V好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
2 D Y0 d3 [& G1 ?2 N+ h( \$ C- k) q( ], k9 L T& t
0 @: j9 X C6 h8 T0 uB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 $ C4 X! i% S- f g, n3 V& h
2 @% v& d/ F9 ^' m+ OF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 1 H2 l# i( ~) @. d
; N- F6 N; A0 @& s$ Z2 |
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
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1 d* D# Z" @8 Z. S. I, OG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M" I: s8 i& N! a9 B+ M
+ D$ n) P# X# M {# c* g# \6 ~. M, b/ `
G11=B1*B'=3.15*28.75=90.56 O* m8 r8 o; O6 B p) z9 h
8 H/ Y4 {. Z. m
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]9 z7 G u* @% x& @' I
! Y6 @ ^$ |% }2 r& y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 \
3 i6 r' B) p; n; C: l% g6 C* |* h W0 f7 S7 s3 A2 @. G$ i
8 f$ z2 _- j s ^, J( I) J 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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