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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑$ x, r3 ~+ T0 Q3 |* T0 ]
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k! u& D. i6 T. q2 H
1 ] \' x0 t. m5 ?6 s+ VG3=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 A3 t' m: U3 D( ^+ \) |7 d7 {
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. [2 A$ ^# x' m, V2 b1 l
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& t" ]0 @) w! L( u* H% h7 K i ^" O9 ?5 w. b1 G6 I5 [
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 B0 ?# Z3 g6 t7 e6 Z/ _5 C5 S: K8 T8 s* q' d0 n9 t+ u6 b% ^
做下算术了: 2 i( y$ \ W: ~: {8 \" `$ f& D/ a0 D9 ]
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
$ N! B* f0 `; l, y( v" |
& A: Q( I( i. D% `* }5 G, m(2)立博: 2.10 3.25 3.00 c* E( @+ s8 p3 C$ b5 M& Q, V/ ]
" x2 ~- V/ k+ q n$ y% P(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t6 V7 \" ^9 D9 l& B# A) Z ^
: s, p& [# \7 L9 b7 G(4)易胜博:2.25 3.10 2.95
6 P2 R' A7 J3 L- U+ {+ l. `) m% ~. _
5 U* m& [) X, U6 M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
% Y( G; o$ O5 E" b/ e5 F8 F, p$ }' ]( i% c# ` ?( }+ M% i. P, I
S1=2.22 B1=3.15 F1=3.01
4 ?# @4 m3 K$ E* i1 A" [" { Z% k" I. i0 n! j# w7 U- X- {
S2=2.10 B2=3.25 F2=3.00
5 @6 r6 t& O. }1 _( G% ^# T/ X4 W2 j% ] s
" }* ?7 o; c% [1 ^S3=2.20 B3=3.10 F3=2.87
( X O8 Y! m Q. N! K. P/ U2 C9 A' e& q. H7 B1 c9 S5 j$ P/ f- i1 b9 d
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
/ j4 n$ ]/ r7 I2 v8 w( d5 ` _0 H- N/ h7 V4 v* i6 d+ S0 t( G
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 2 Y4 \) [0 }* C
. F+ D5 j9 k. O- {+ q% g1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l: a6 K+ t, Z) K
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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' q7 e- W5 [) _7 H U' p2 z
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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 6 i1 f* Y1 d7 c
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S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
9 V5 `/ l6 M5 s5 k
$ O$ C' C+ f; H; f. M1 o9 v* v类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j7 S- v1 @/ W1 ^! W9 @! u4 |
5 B0 n, o) c1 l) [; m' _
S1'=41 B1'=29 F1'=30; 9 W& Y% p: O& q7 H. E6 ?9 E
, w* Y7 k6 k, x- t1 Z: f qS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
. H: H/ ~) L6 r9 R* v' o2 M; m' V% T, u, P% O( ?( [6 @' a& P9 g2 A- k" ]2 i
S3'=40 B3'=29 F3'=31 ' h5 \( S4 c# p. C0 a
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a& ]3 r6 S" b. N6 L% ~
S4'=40 B4'=29 F4'=31
1 Q+ H9 p4 o: m+ x: B6 y" Y' M2 }4 T/ O0 g4 ~
) m" I/ T% S9 i2 O$ g/ d& C2 z(注意:3,4两家公司,赔率不同,但它们的胜,平,负率相同了) 8 [+ b0 b& X# U( [. o0 F+ d8 f \4 G
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; y5 B! l+ E* J) ?7 D( H% B0 _: p4 z好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 + Y' p3 Z" c/ ]0 B& P/ [
) q( ], k9 L T& t; b6 d) H& T, R. A! h' l5 _* X6 \
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
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s( `5 q5 A: q8 ~1 e; j0 j$ CF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
! N+ i- |2 y1 `& Z; o* r& D% K; C3 {
: j' W, m! n1 e& `. d f于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
5 ]- {7 s' ? J( d9 E ]' p: I. D7 h. {
* L' ], N* W1 S$ v' t) @" Y) jG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
6 E: n% ?* k- y: `, t4 `+ D$ n) P# X# M
" c' i' C1 d3 E, L/ V6 N+ NG11=B1*B'=3.15*28.75=90.56 9 y) ^6 S% B5 M( t i
+ q' q4 ^6 W8 Q \; \G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
; Q( V2 }( s, B- O7 ~
. N1 J0 U: r7 `1 ~2 E: x) Q当然其它几家公司的凯利值也可以通过同样的方法求得,当然,事实上你不用去求(每场比赛这样求,不累死也气死了),赔率比较网站上都是这样算的。 好,到这里你应该可以知道了,凯利指数是怎么样被扭曲的了,因为除了赔率是真的,其它的都是做梦的时候梦到的(并非是攻击凯利指数,这个,前文和接下来的一比较就可以发现了)。 + J& N& @* n# J/ ]6 \) T; l. L* ]$ o) V
6 C* |* h W0 f7 S7 s3 A2 @. G$ i' x, a& ~. a0 F6 o0 @0 W
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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