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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑6 r+ t9 ~; j) c$ a3 \! c: M
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* m/ R. i& {! l: {4 }9 r! l凯利指数的计算方法: ( O1 m2 a L3 d; F& D k( Z7 j: ?+ Q' u+ m' Z1 U5 l' e5 }2 F! ]3 B
$ x4 @9 T, Q3 G: TG3=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)
. ^4 _, j- t& }/ l l/ D, A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. [4 d0 N: I% x; C( B8 ?
! K/ a c# i3 x9 O- X6 O( C9 ^/ P& t" ]0 @) w! L( u* H% h1 T, Z6 l: _- ~+ }4 ^/ W9 C. ^8 r
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!
4 t4 V F3 W* p# E0 e$ }8 Y y7 e6 Z/ _5 C5 S: K8 T8 s
4 j+ I3 m( c( Q做下算术了: 2 i( y$ \ W: ~: {8 \" `( K- \$ O Y6 t
; ~' L. y! k5 F, M& W+ d* V5 n$ V y8 d. M3 G- L9 j7 Q+ @
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n( B6 [4 t9 |* F5 H. D7 U
0 d' c2 ~1 l/ j! F3 l6 n7 b
(2)立博: 2.10 3.25 3.00 2 s1 F$ T8 `) G* Q
/ ?' W1 h* j- y7 H(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
; F M: k1 G! w' {) R3 b5 q; U
5 n1 N' c2 M& y' u. ?/ U8 q(4)易胜博:2.25 3.10 2.95
3 C' m2 k5 y+ E$ ], c7 k Q( F- U+ {+ l. `) m% ~. _
1 p4 x9 u! d2 |+ t1 M7 R! x# x v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
) n7 N8 K. B/ b4 H; |( u8 |/ A5 E5 F8 F, p$ }' ]( i% c1 w" ^0 I# v( j& p+ r+ B, t
S1=2.22 B1=3.15 F1=3.01
3 a5 h/ r/ N7 e/ {! ^
$ \/ I( E5 u; n4 @' \3 n8 qS2=2.10 B2=3.25 F2=3.00
4 g" u1 ^# p/ Q% ^# T/ X4 W2 j% ] s
5 f% h; [3 b9 Y7 B% _7 d5 rS3=2.20 B3=3.10 F3=2.87
; d+ j7 S5 u5 W9 A' e& q. H7 B1 c9 S5 j
( B( K6 }, S+ s% xS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \+ V1 x+ t- q/ W+ q# g* G
8 w( d5 ` _0 H- N/ h7 V4 v
+ Z" D: W0 [3 m9 t# C, p, q V. N1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
$ K, q4 q8 X2 B; u' I/ X
$ r, | X& d9 E8 U+ f1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
7 a2 E6 y- H% U$ }2 z; y
! |" H7 |% F* o: [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
8 L2 o0 w+ Q' I D8 E! d2 X
+ S# L$ o/ P! ^4 F5 R1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
* K. y; L5 z0 v7 @: G+ x9 Y- y- K6 r! w$ c1 T. z/ m1 s6 \. v! v
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T" g- T: O) L! |+ |
( K4 x9 b4 v' q/ m类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j5 [) D/ v2 ] Y+ C
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S1'=41 B1'=29 F1'=30; 2 G7 E7 D$ d* {! ?
- @0 j: Z0 F" M# y7 ]0 ?4 r: WS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
* r+ W6 w6 D4 S3 X4 g$ c+ g; m' V% T, u, P% O5 h5 M+ j. H) h0 }$ X
S3'=40 B3'=29 F3'=31 d( o* a% c5 p; R2 E
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
0 K) w* g+ m' T5 VS4'=40 B4'=29 F4'=31 . T+ h/ n. s% p: e C% i1 I9 s
: B6 y" Y' M2 }4 T/ O0 g4 ~+ I1 A; `9 l7 r' l4 u0 ~. F
(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( [. o5 H0 K0 J5 H% E
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
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9 W- }/ y% u/ l% B+ aB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 : u, B5 V1 K2 n. {/ i
+ F7 {2 R: P. o+ E. w. S于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
# W0 G# _0 P1 o/ d* j9 E ]' p: I. D7 h. {, b5 h. f r- R/ \5 u7 v* ?
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
4 i8 v; z: \( ~; v+ D$ n) P# X# M
, b7 l8 t2 `2 q8 m4 C0 c& D& nG11=B1*B'=3.15*28.75=90.56
, e8 ]5 Z+ W8 e0 _8 m9 h( w& M+ Z; f, f" H/ [3 T+ y
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
# _- \6 N/ H- Q& u
* w1 Y1 E( {, s8 V0 |* @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 \
2 _2 j+ g: W2 g6 C* |* h W0 f7 S7 s3 A2 @. G$ i
% e2 g3 O5 |0 y1 O- M2 [% y 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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