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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
7 h. ]. |( n; f% B5 H* f/ a/ y4 p# R- a1 ^9 v! c7 r" a2 J' `1 z# q, m) G5 p3 z a/ }
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k% C7 \6 {5 |7 E+ G9 M* m0 h0 T
3 W' o& p0 a8 [: M2 ]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)2 q$ U9 L4 d" X2 ~
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. [6 R% O7 a T* `2 X) |
5 @6 b- X" X, ^' [, I8 {$ r
& t" ]0 @) w! L( u* H% h" U: Z, z0 `* r7 T
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!
]/ }9 E- P' Y2 T7 e6 Z/ _5 C5 S: K8 T8 s! Q. |+ D. F) y$ E% _7 M( W# w3 j
做下算术了: 2 i( y$ \ W: ~: {8 \" `
8 w$ Q' |$ Z( T& S( m$ h; ~' L. y! k5 F, M& W+ d
( t( T7 W4 e8 g9 G(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
& Y: a0 n: @/ M8 N) P, Z; c; r0 E) r+ O
(2)立博: 2.10 3.25 3.00 , W1 b4 K* ^! ~- t1 Z) K
. Z) h* \. f- a1 ?$ l
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
: V' b0 ]! L$ S, G% d* `% Q. {- u( e3 X4 N- n' g, o: ?
(4)易胜博:2.25 3.10 2.95
* N9 u+ H- h$ |6 ^6 u- U+ {+ l. `) m% ~. _
. q* F g/ o- ~. 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
! G5 t# T) q6 R5 F8 F, p$ }' ]( i% c6 [4 a5 W# V6 b' x7 Z/ t
S1=2.22 B1=3.15 F1=3.01
3 [2 c( j% ?; `2 w) g# v: e1 r6 s6 d5 d: |# ~6 q
S2=2.10 B2=3.25 F2=3.00
; D+ V- n v! g$ y: z6 b' ]% ^# T/ X4 W2 j% ] s( s, a+ `4 ]2 F! [
S3=2.20 B3=3.10 F3=2.87 ' x# d- `$ x, ?: S0 f ~4 p' E% y( I
9 A' e& q. H7 B1 c9 S5 j+ ]0 _/ c# T5 t6 O
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \% Q! y7 M3 F+ W
8 w( d5 ` _0 H- N/ h7 V4 v8 P$ l/ c9 w. c' K) |
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 . a) ?; m% R$ U& o
- J7 D+ q- U1 z, L R$ C
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l5 U" B4 C" w. v; D6 Q2 X3 z
$ K% t+ l. q5 G" z0 N2 M1/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
( O3 S4 W C+ h6 F4 E: o6 a# d" c# p7 M7 A/ U$ {/ T; r
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 ( }% i9 A1 ]& l, I; r6 u. x% c
: G+ x9 Y- y- K6 r
# l) s4 y# G, _# V; sS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T% y6 a' j0 n. O( T# b4 g
* D1 h. Q- A8 u9 ~# W类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
! Q7 s3 W# l9 l
6 n( v6 O, r; O" l+ \4 D( eS1'=41 B1'=29 F1'=30;
4 D# d$ `. j9 Q5 I2 r A, ]. j
8 l) `) g0 I# @3 z {7 l dS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
+ V5 w, V. b8 t5 q; m' V% T, u, P% O& u4 x2 _: m1 L) @; Z# I
S3'=40 B3'=29 F3'=31
, Q9 L, n- }8 n4 u6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
; j1 p% K6 m( P( iS4'=40 B4'=29 F4'=31 ! T. Q6 F8 C* h# O% p& c% u9 E9 [
: B6 y" Y' M2 }4 T/ O0 g4 ~
6 I5 q; C. _# y+ s' G(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
$ o! W: V5 ]" k2 ]6 a* R9 Y/ Q" p9 \
$ r3 V: {7 q6 M1 ~ {好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
4 R- y/ I; h- f& c: h p. }) q( ], k9 L T& t
- x! m# z* N/ e6 K$ R/ mB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 # D& h( y x$ E$ p& o5 X
. H" k7 y3 |4 p$ E% r% T
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
5 O" L) O. A. S" M9 i- [& D, y" Y
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
5 a4 o# K& Q8 z) g0 Y/ N9 E ]' p: I. D7 h. {
( _, b! b9 ]# OG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
; {# o; Q/ B( D& Z1 y6 M+ D$ n) P# X# M
) s1 V6 B! ~9 \1 S; }0 `0 DG11=B1*B'=3.15*28.75=90.56
n. Z3 Q5 F: |9 f9 V0 q+ A" I$ r, r$ O. ^& p; X/ B
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]8 O% ~0 r+ V8 B! E0 |! J
) q" ?8 o, v' |7 g7 S
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 \
# |7 d/ ~9 l; w; ?! g! B. T6 C* |* h W0 f7 S7 s3 A2 @. G$ i
W% E4 h& k8 U3 Q4 O9 I3 w* G# I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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