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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
( M! n' W2 S; s4 ^" Z" w, [* f/ a/ y4 p# R- a1 ^9 v! c3 s9 h. N7 x% J _- h/ t6 O5 ^
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
4 s4 T5 c. k; E* G# U
8 C+ i+ O% @; `( G1 S# Y9 ^8 q- x! pG3=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)* _5 {3 U9 k( O" F2 p
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 O9 H' Q4 f5 b
- I/ _0 V' F( Y( `/ j4 @1 X! q& t" ]0 @) w! L( u* H% h
+ j8 s: x3 e/ i; d+ J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!
3 _9 I7 X' I$ [3 K, t9 d& c1 w Y7 e6 Z/ _5 C5 S: K8 T8 s0 W. a; ]" e1 E- a; ?! r, f
做下算术了: 2 i( y$ \ W: ~: {8 \" `% I- V2 W! V5 G4 k' N
; ~' L. y! k5 F, M& W+ d
. M6 m k) ~/ t# h7 g! C. h2 ?(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
6 i5 E4 s0 K2 R( J) N
! W" k1 }$ v6 t. Y( o/ a(2)立博: 2.10 3.25 3.00 , G+ j" W3 r5 X1 v) o6 |# f/ B1 U F
! y# f8 r. d; O n3 R# H(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
7 I$ l6 Y" {0 A& T1 x* x" E% o) ^8 ?5 N9 K5 r* F5 C2 U0 k# k
(4)易胜博:2.25 3.10 2.95 + n3 j8 a- V" r1 d6 D4 X4 W
- U+ {+ l. `) m% ~. _. x$ h' E+ J; G$ H, g# W6 r; 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 7 w! }! [% }. O
5 F8 F, p$ }' ]( i% c! a3 b9 h$ u* X$ e6 m
S1=2.22 B1=3.15 F1=3.01
2 s8 |& _; b8 w; J( J- V; S* {7 r5 ?. |
S2=2.10 B2=3.25 F2=3.00 & z! E8 `* H" k; {; N5 u
% ^# T/ X4 W2 j% ] s: K( C c8 d. Q: N( f
S3=2.20 B3=3.10 F3=2.87 * q6 Q7 z$ }4 k9 Q4 ^
9 A' e& q. H7 B1 c9 S5 j
) ~, S$ u+ \9 P- n0 pS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
6 Y- }8 n5 z' q V& S8 w( d5 ` _0 H- N/ h7 V4 v9 n! p' s, G0 z0 {1 l( o- }
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 . \. U0 M: y0 S q: P; V
6 V& k/ n7 z6 P& s% \1 P1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
; a2 f3 t1 y6 }! b. j- [. w, o2 a6 Q G
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' q0 s% b+ B) q Z& u0 c; }
1 x( R% |3 m. F; E9 A1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
* e' N d3 ^2 x: G+ x9 Y- y- K6 r
) {' o2 _" X1 Q" E0 R5 R4 ~7 _2 CS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
$ X5 w W! }1 T! L* y
4 X9 w. g' N( O' l; h类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j5 V( T* f& x0 n- g
* E/ ?* f* T( ?; K( VS1'=41 B1'=29 F1'=30;
' ~7 L2 \6 Q9 P5 G( f
- ~/ i8 z8 K" H8 r0 ES2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s- V7 l8 E# b, B# q; o0 G
; m' V% T, u, P% O$ ~7 ]; w2 _$ R0 {# n
S3'=40 B3'=29 F3'=31
9 N+ E$ |: m" g% G' i) D" c6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a8 [( Z0 l8 u, U) u
S4'=40 B4'=29 F4'=31
. A: e9 f( _2 {" H, O; `: B6 y" Y' M2 }4 T/ O0 g4 ~, Q( U Q6 K2 B3 R, i
(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
C+ ^) Z; C% r% g, x* R9 Y/ Q" p9 \! ~6 Y% _1 Z: R2 ]! } G
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
+ K% b0 f) g) G! S) q( ], k9 L T& t/ b5 c, K) E/ g/ ^ {
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
5 D+ K# J+ \% s, D- L8 K+ n* w$ n$ e' a3 n
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
4 |' g& l0 F' z1 i/ K( I+ @6 n- }7 d) v: I6 |0 _
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
, A0 x; }5 W( R9 E ]' p: I. D7 h. {
. T8 G# z- k5 }9 p, s% k2 cG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
& H2 |5 s/ K6 \1 v1 O; }0 w# L+ D$ n) P# X# M9 @; I2 l. H+ W+ H i. Z
G11=B1*B'=3.15*28.75=90.56
2 i9 T" W, Q0 ^; l/ w! [, ~
" k3 `. j( N N |( ~5 m3 n* DG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
8 \8 M; x9 t/ q% K i }2 S1 K* j" q ^4 M4 Q4 [: M
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 \, E( z5 v6 b/ d- n4 A& i9 `
6 C* |* h W0 f7 S7 s3 A2 @. G$ i2 V) s% ?0 v( T) M1 h' V( H
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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