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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
: g; j. u6 v( u. x* f/ a/ y4 p# R- a1 ^9 v! c
; l# m) C2 b/ s8 J# G. Y) ]凯利指数的计算方法: ( O1 m2 a L3 d; F& D k3 B: K" H0 b* z" i
, [9 ?( Z$ k; k4 o1 R8 L0 mG3=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)
: p; v& N7 \! z1 i; Q5 s/ o$ L7 g; Z2 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. [5 v& U7 }' i- |/ y g5 ]6 N
6 f- H+ M+ E5 E& t" ]0 @) w! L( u* H% h1 Z e. d, l/ w
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!
) M9 V$ ? ~6 ~( n0 ?* V7 e6 Z/ _5 C5 S: K8 T8 s
, L0 ]3 Z, g2 i& d做下算术了: 2 i( y$ \ W: ~: {8 \" `6 ^$ Z, Z4 w/ e! u6 \2 G4 l( q
; ~' L. y! k5 F, M& W+ d
1 e6 ?( B* X+ A' a. ](1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n5 \( x4 e) S( t5 ?, K, G4 y( @' l
/ ]( G2 F* A$ U7 h& K4 `& O8 T
(2)立博: 2.10 3.25 3.00
/ a' r" U" y% `( }" K# A& O- }5 a8 \; \2 \6 |5 l" \ D, P0 E8 I
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
' R0 {* ]0 w. F4 K& @
* b$ }, l$ V7 e X7 n& |" a, N- d(4)易胜博:2.25 3.10 2.95
8 L6 _3 b. a- ?, o- U+ {+ l. `) m% ~. _
& U+ K* @" u* v/ R) l. U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 / c7 t/ p' d' E6 N
5 F8 F, p$ }' ]( i% c5 b( N, @& V. q5 V$ D
S1=2.22 B1=3.15 F1=3.01 : t; V8 Z. w3 ?! D
# B7 ]+ m" D9 |) b$ c/ ES2=2.10 B2=3.25 F2=3.00
9 _6 `/ ~% }9 h0 S& E' S% ^# T/ X4 W2 j% ] s, B+ ]/ e. L( C6 M
S3=2.20 B3=3.10 F3=2.87 - N( M7 {9 b9 l! G7 D
9 A' e& q. H7 B1 c9 S5 j
( y& C5 X$ h8 h- U- TS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
+ D# i" |* ?/ b Z. r- t* E& r8 w( d5 ` _0 H- N/ h7 V4 v
z0 O. B( y- k: P3 L% j/ S7 D% W4 o1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
4 z4 k/ H' C. Z/ K2 Y( U: v6 q+ G: x& I0 r* _) x8 u, j8 |
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
/ X/ N5 v: ^4 D8 a& v0 }2 s& i. N5 c2 A
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
1 ]' U% L4 h1 [' u! D# ~6 T
; A7 ]- `4 l( f7 G* |1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
7 K4 K2 F% a4 x: G+ x9 Y- y- K6 r; T5 q* h' G. X Y' s; a5 k* v
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
# X* K7 g2 x% w8 G# \* a5 Z+ \' i+ c, |& J( s7 K. A
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
6 Y% w8 Q1 c* e9 G' l2 ~- S( [/ x& O* \
, ?8 A% K( m7 k# z5 mS1'=41 B1'=29 F1'=30; ( Y+ O `- B& Q1 v2 R/ I
, a9 y: L+ Q* D' Z
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s3 w$ g0 S, X2 \2 w ]
; m' V% T, u, P% O
2 q9 B" [ s8 A3 Q: rS3'=40 B3'=29 F3'=31 , [* ~/ n ?9 Q( Q
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a6 [* D$ s- B0 t; C& ?" Z2 q) C. D
S4'=40 B4'=29 F4'=31 ; u* w5 O0 }: m9 E' `. @2 M# L
: B6 y" Y' M2 }4 T/ O0 g4 ~: Y& E- F' l5 y/ b$ N: E) B
(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( [. o7 s/ M9 e1 g! r
* R9 Y/ Q" p9 \
* ~4 w- k9 {1 P) q8 h7 o0 ?好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ( f* l5 S6 v- A' s! |1 \) w
) q( ], k9 L T& t
3 T+ z; A$ I4 hB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
* n; s: b. R X* D0 y- h
% a, H: U V% ]8 EF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 1 c( O; V0 \4 f/ a2 i: ^
$ U% K/ D7 D9 z! R6 a! Y/ a ~于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?! @5 {% ^6 X" E; g( ?* V/ [
9 E ]' p: I. D7 h. {
8 T! L7 G, X2 `# X3 CG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
9 |! `2 W$ w+ H* j$ F+ D$ n) P# X# M5 ^7 W! b5 |: v# F8 |
G11=B1*B'=3.15*28.75=90.56 {$ x' D& E6 o ]1 p
7 @, l- T/ h" O$ R8 {G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]1 }* f( m+ Y: G: D. Q" Q
5 I) j/ s) d- S2 P/ 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 \# N2 t4 ^# g7 z0 Q/ `
6 C* |* h W0 f7 S7 s3 A2 @. G$ i K# q/ b5 ?# F2 F1 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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