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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
4 R$ B0 S. R T8 o* f/ a/ y4 p# R- a1 ^9 v! c
+ k! H9 D; O! u( ]: F+ s% I/ U凯利指数的计算方法: ( O1 m2 a L3 d; F& D k4 J2 q7 B) z; D
8 k% s" k7 {- `" x2 lG3=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)
7 p" @$ b P5 r' S3 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. [/ H. _4 H+ i7 U0 R& E
7 b6 O+ N+ m: {1 t. [" _1 Q6 |& t" ]0 @) w! L( u* H% h
$ n* F j9 x* }2 [# P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! 6 O7 ]: W2 K& l' R+ m: e0 r
7 e6 Z/ _5 C5 S: K8 T8 s/ ~! m* J8 c: O) {
做下算术了: 2 i( y$ \ W: ~: {8 \" `. C! K! }3 r- r
; ~' L. y! k5 F, M& W+ d
2 |* p/ L; t' O$ E4 p: Y(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n2 I6 T5 y) s+ j' s1 \ f; K1 Q" X
0 z' H& g' G( U" i
(2)立博: 2.10 3.25 3.00 9 U7 n5 s2 x" U0 t
( E6 M4 I( \8 t+ D, v6 f- y(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
, Q( X# f0 X P4 m* T# [ ~8 R- d. K- T% g1 `( D6 V
(4)易胜博:2.25 3.10 2.95
4 C& h, r8 L5 c2 s- U+ {+ l. `) m% ~. _) r% F6 |* E, o' D5 { f5 L& a1 O
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 - r) p) {$ |) ~* ?
5 F8 F, p$ }' ]( i% c, U9 g8 G1 q5 t$ O: E+ A/ k* |! {
S1=2.22 B1=3.15 F1=3.01
% m' H Z- i- d4 T& ~8 ^) C7 S7 K ]$ ?5 M
S2=2.10 B2=3.25 F2=3.00
" W- M& o4 @' k2 D: O3 P% `% ^# T/ X4 W2 j% ] s
, o/ j7 H/ k+ Z$ GS3=2.20 B3=3.10 F3=2.87
0 B1 t6 d8 W! h4 B# c9 A' e& q. H7 B1 c9 S5 j) g# q6 j) y6 }
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \( m9 I5 [" J. m6 z
8 w( d5 ` _0 H- N/ h7 V4 v+ H: s9 f/ ]! q8 u8 R
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
# N/ K( w1 \- }2 R Z+ M2 T1 n+ @9 Q9 z* n( y. e9 Y3 \
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
# f* K1 l- ~3 E1 c3 f, x8 b L
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' q4 h9 E q& z$ B l2 p
; V( l0 [5 @3 d3 Y+ S7 }9 `% h1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
- {- Q, O0 U2 P+ K: G+ x9 Y- y- K6 r
2 A3 ? A! M& U" |8 g v- KS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T6 H1 u6 J2 v: R I$ i0 P7 Z) O+ B e
8 ^4 b3 ]5 K' v0 t5 f
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
$ _0 b+ L9 u& o" R+ n0 B
( Q9 J* |2 p9 O2 bS1'=41 B1'=29 F1'=30; , N& A- U" }6 G, \6 e2 V
" b; h! n8 m& p; P, t
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s! R$ n1 V9 u8 Q6 Q
; m' V% T, u, P% O# A% R( c+ s7 w& j+ J& J: N
S3'=40 B3'=29 F3'=31
* F8 q" D2 M! ?2 s( h* h# m6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a3 h: B! j% |1 q$ v* N0 I
S4'=40 B4'=29 F4'=31
5 U# ?: ]1 i8 m+ [" U2 R3 f: B6 y" Y' M2 }4 T/ O0 g4 ~
U/ g* ~2 B: Q" r; H(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, Z- n% S6 q7 M7 o; c
* R9 Y/ Q" p9 \
* h1 J" {+ Z) j _% F9 M* s好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 3 l2 A) l; u8 _5 M
) q( ], k9 L T& t
, p. w8 F0 z5 g6 k, g7 [: v0 S( GB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
5 W0 _: U! O# ?/ [/ I3 c
* D. V3 X5 S: }8 w$ @F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
" t# B: L8 x$ [/ F, P I3 S( W7 r `+ k# C |8 u
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?. C. a) [/ }1 y& K1 M. L9 O
9 E ]' p: I. D7 h. {
0 J5 J) Y& i3 n' \G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M; A! g0 W7 U! I2 v+ }
+ D$ n) P# X# M
4 Q& P l- N. o; ZG11=B1*B'=3.15*28.75=90.56
, [- v3 R1 K5 m7 l3 f% v& a/ t4 A" u4 \
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]* c, ~% [% M$ e$ B+ V% t
6 y: p$ b) C1 l0 ^( m+ z- 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 \
+ U' r3 [" m, L. ?3 E6 g( O6 C* |* h W0 f7 S7 s3 A2 @. G$ i
0 s7 w* O8 }4 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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