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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑( W" _; O, H; L+ R$ N* n/ h
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$ V' M! }( Y- k% a" }- s I2 W4 [凯利指数的计算方法: ( O1 m2 a L3 d; F& D k+ k0 m( D; W, Y& O5 d; P
" b5 j$ v' G8 F( H. N0 o& }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)
- T) ~$ D/ z) M$ F& M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. [
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4 D3 C1 e1 O+ ^& t" ]0 @) w! L( u* H% h
& n5 K& |5 L Q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 b- a; O1 K3 Y# f7 e6 Z/ _5 C5 S: K8 T8 s+ B1 Q0 \: J& G, {& U, d
做下算术了: 2 i( y$ \ W: ~: {8 \" `. ?1 Y6 F4 |" c
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n8 f9 G& T5 A4 r* O, T/ {. x. O
3 U! c& l7 v, O
(2)立博: 2.10 3.25 3.00
# g' [& i0 v) J7 \7 H
0 R! _9 `+ b. K E- i, U. r0 h. n9 J& J(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t8 `/ u% o9 d6 C6 t
7 C) E" B( U3 @. m8 p- b. q(4)易胜博:2.25 3.10 2.95 , E* P, v S. b5 z M
- U+ {+ l. `) m% ~. _6 o+ M n) t% Z4 B4 O2 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
+ _: M g8 w. }" E5 F8 F, p$ }' ]( i% c; a$ _) T5 d; @+ C
S1=2.22 B1=3.15 F1=3.01
! L8 Q* U" H' @
x( p4 `/ i$ t1 ?S2=2.10 B2=3.25 F2=3.00
3 i" m$ h0 k& c% A% ^# T/ X4 W2 j% ] s0 W) {6 k( p- Z" \; E7 y
S3=2.20 B3=3.10 F3=2.87 8 \ D" r0 k; e* Y; s1 s* p
9 A' e& q. H7 B1 c9 S5 j
: _0 @% ]* }0 D( j3 \4 jS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
5 U8 E: A& z( ], D L, s9 u2 K/ \8 w( d5 ` _0 H- N/ h7 V4 v
! q/ F! q" p1 m7 Y& H( P1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 " b! {7 e0 U- X
2 B [; @9 R P/ }" V1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
. ?/ D$ D9 Q5 [- r% K5 [) y5 R: a
/ [: k/ C6 s8 J7 C* {' v$ B/ e1/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' q6 |% D9 F% O' _( h: s) i. p
7 \/ }0 q0 Z6 P/ x: E7 N1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
% M7 X) u ]# Q+ f1 G: G+ x9 Y- y- K6 r
) C) b5 E/ c- tS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T- Z8 C) G3 v9 @% F% v
" ?- ?& e3 s# Y3 p! W0 G& X# h类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j5 V% w0 S2 {. Q1 `' \
+ t" s4 Q4 @# j
S1'=41 B1'=29 F1'=30; $ a& U' o- @, @2 y* [) _
2 F& O4 b" ?* r( T& hS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s- |% ?0 t X, m& E' j
; m' V% T, u, P% O
0 x& ^! m- M ~4 ^* P3 x$ qS3'=40 B3'=29 F3'=31 3 }- C+ V& B. G
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
$ ?( z s7 `7 J% q1 Q/ y8 @( Z2 ZS4'=40 B4'=29 F4'=31 $ A: S! P( I, H9 Z! J9 R" o& |
: B6 y" Y' M2 }4 T/ O0 g4 ~
4 q& F+ A) b, \. b4 s* V6 N(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' I5 ]- S3 f0 \
* R9 Y/ Q" p9 \
& r+ S# g8 p9 m# Y' D* a) g2 u好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 6 X* W1 m- g& q) O- i1 ?( ?: I
) q( ], k9 L T& t
$ Y) S, B+ R- P# J$ D, ~3 E! A6 FB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
6 L2 g4 x/ ~' D" W& h% s9 T- F8 }& P! j' Y( c
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
& P5 ~# k9 {' j+ A5 q( K1 e! q6 L o5 B/ j! n
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
$ e( i( @" ?1 R- ?9 x; v* r9 E ]' p: I. D7 h. {
/ Z% ]4 N2 [/ M4 E) ]G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
3 K1 C. r- M8 B9 s. o! _8 p+ D$ n) P# X# M
" U' v4 f1 @) B* o3 F5 D7 {G11=B1*B'=3.15*28.75=90.56
) k- t: q8 d. S- D7 d+ O- `
# M8 _/ N9 c9 h! H: K/ Z$ G) t. HG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]0 w8 V0 P/ h% f& K1 A- X
& ?( |" i& g6 N: q3 n m# `1 d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 \
6 ~/ q$ C$ S; D# X, z$ w6 C* |* h W0 f7 S7 s3 A2 @. G$ i
6 e( ]3 [$ [# u# H9 F2 u; r: ]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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