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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑, `7 \0 j5 T0 f6 W9 }
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4 d3 t: s4 H! f7 k' U6 b凯利指数的计算方法: ( O1 m2 a L3 d; F& D k6 @* }% G" n+ M4 ]& t" y
O. H' a. C5 i! U. Y7 E* ^# Z0 q' zG3=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)
: S0 W3 w2 m% n6 @9 y/ T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. [
0 `6 r1 d3 i5 P2 C2 b5 ?% q# a$ G0 C* O+ k
& t" ]0 @) w! L( u* H% h
( ~; O7 c2 x: g2 |0 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! & a: X+ j* L C4 @
7 e6 Z/ _5 C5 S: K8 T8 s
: I' `$ e4 l4 K/ H做下算术了: 2 i( y$ \ W: ~: {8 \" `) e0 ~! |" n" W( {, ~1 W5 t
; ~' L. y! k5 F, M& W+ d
2 p4 H3 z# a0 G; f(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
/ e+ c- }, V1 @- v+ @9 a8 I2 v7 g) e
|3 b5 Q5 t x4 Z(2)立博: 2.10 3.25 3.00 0 E7 j! S- J3 ]/ h
3 F( N% ?: ^' @. _/ ^2 Q4 Z(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t5 Y, c( j) k" R# C( @* T
5 G# P @' Y, L9 M! N) b( u7 R(4)易胜博:2.25 3.10 2.95 * F2 F6 T. U# X t
- U+ {+ l. `) m% ~. _
& }" p3 _+ k- G) h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
# w5 t+ U2 J4 a! A! h, a5 F8 F, p$ }' ]( i% c
. d: p+ x. E; y! QS1=2.22 B1=3.15 F1=3.01 % S) v1 _# F5 Y! i. Y# i
! q$ h, A& U* C/ S# N5 E
S2=2.10 B2=3.25 F2=3.00
( o* r4 e, d6 a, n% ^# T/ X4 W2 j% ] s
4 _8 I# C% c# B: e; `) M$ Z* ?S3=2.20 B3=3.10 F3=2.87 5 \" k" V- @: Y9 J u1 V; b
9 A' e& q. H7 B1 c9 S5 j
. a/ D, k$ ]/ S3 _9 F) R2 OS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
; ~) d5 k }6 K3 e/ ]1 k H8 w( d5 ` _0 H- N/ h7 V4 v
. U: V( L' B/ \1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 ! n' V R( p4 x J- s# f# i9 }: |
+ d4 o* H6 J! j) f* b D1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l- s- I- e4 l Y- C
$ [3 `7 V) z! u: v* q& U
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
+ |& K% q' P" s- ]4 ~
, A; }# N @! K- y1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 + R" W9 a4 A% b+ D0 E7 C% @
: G+ x9 Y- y- K6 r
& G9 j' t, o+ _/ cS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
; Z5 Q r& h2 ~3 T' B# H s+ U( x& J1 ]% t+ b- W
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j: Z# J8 j+ J, H- j
, Z! A% s( I, e! }( v q8 H6 n) b
S1'=41 B1'=29 F1'=30;
7 _6 ?( c, X. M5 t+ `; h! W0 z' u$ P, W' a+ y W) ]! M
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
' y$ ~9 Y( U% u; m' V% T, u, P% O( H% E2 P' O5 u9 q2 d0 J( v1 V2 j
S3'=40 B3'=29 F3'=31 - i3 H+ W! g2 n
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a* h6 Z" W: n7 P3 R0 I, R' h
S4'=40 B4'=29 F4'=31 + B2 s N2 n. x0 M0 r
: B6 y" Y' M2 }4 T/ O0 g4 ~
4 I* a' t3 i1 V* ?) y$ 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
" k# R7 ^; ?$ _* R9 Y/ Q" p9 \
}) q$ M2 F- T$ A4 r5 u好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 4 B+ O/ x" B }" Q2 A
) q( ], k9 L T& t1 E2 O/ u. ]- o! {& C' a# e2 Z
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
( y% l& ^; L' q& D3 ^4 Y6 N: _; @. g u3 I* C( c5 \
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
3 J9 v, x! A( |! A& a
' q4 [7 m* K2 ?* t" Z3 ^( f于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
5 L. o8 S6 \7 c) l. V3 ?% a9 E ]' p: I. D7 h. {8 L3 F! v, g3 R
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M8 S3 j- F% r* {) Z$ i) {
+ D$ n) P# X# M5 g' P& }) a0 m' T3 s, T
G11=B1*B'=3.15*28.75=90.56
: i9 U2 A6 u- B0 V6 c1 |8 J" U% L2 w [: W
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
/ U3 p& I; r3 s+ x1 v
! R# b( B j4 j6 g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 \# s/ }9 t' A; a' h) R$ U" V" N* A
6 C* |* h W0 f7 S7 s3 A2 @. G$ i1 w( Y( R" l- V4 A4 ]2 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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