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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
* c9 p, y9 [6 x7 D0 o& q' _* f/ a/ y4 p# R- a1 ^9 v! c
) Y. I# W8 G3 T凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
% Q8 X i* t( I4 N3 U2 d1 [
+ S. N1 t# E4 D, {' 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)
! l7 h9 w5 t' B9 _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. [
, i! A0 |# C' f8 N% u7 I8 {
5 B$ k* X8 e* J* R& t" ]0 @) w! L( u* H% h
! r A& ~- J# i. Y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! H, g2 A1 O+ [3 F( T, ~" U, v
7 e6 Z/ _5 C5 S: K8 T8 s5 t0 U! L& @1 \7 ]) S4 G
做下算术了: 2 i( y$ \ W: ~: {8 \" `
. }. F1 u' g$ }0 Z6 T8 S; ~' L. y! k5 F, M& W+ d1 v% O) _; Q f/ b* y
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
( \( l+ @! K$ I, [9 ]# c
2 p, z; S8 T! v) ~(2)立博: 2.10 3.25 3.00 1 t9 O/ \: W/ W, h7 ?, F# m
& Z; `2 K+ o( j
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t6 |: y$ E1 u3 {/ W4 w1 p8 W, E
9 C- n9 a! M9 m( t: u+ ~
(4)易胜博:2.25 3.10 2.95 9 G/ M5 |+ ]& Z5 H
- U+ {+ l. `) m% ~. _# K; X7 L( B, u s/ 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 ' C) b* g4 D* }; N$ B% T. I9 R2 b2 C
5 F8 F, p$ }' ]( i% c
* `! L2 H1 Y* o2 rS1=2.22 B1=3.15 F1=3.01 / _8 c* H3 a5 W& C
9 @( j4 I* z& n3 e& n( iS2=2.10 B2=3.25 F2=3.00
7 x7 x4 n) U$ w5 {( V% ^# T/ X4 W2 j% ] s
) w0 w: h/ g3 q" t" fS3=2.20 B3=3.10 F3=2.87 * a1 K6 q$ z C6 h9 O! N* q$ J
9 A' e& q. H7 B1 c9 S5 j; ?1 J1 `8 l* j x/ V
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
( n8 A% ~+ r* D" T5 a8 w( d5 ` _0 H- N/ h7 V4 v
. X7 Q1 h1 q+ Y A1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
& m! l J( k x. k% g$ g& w- M8 E0 y% {3 C& B1 I9 l9 a- ]
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
/ }% z, r. _. A0 U6 V4 M* C! L! X) C# c! P" C- e! y/ s( O4 s1 G5 H
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
3 z: \$ p/ H8 A' B5 s* D& Y3 v+ e% L
- p" G1 B x9 B1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
( _! `5 l& d! E K: G+ x9 Y- y- K6 r8 I1 I- ~, R6 U R s
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
" d) _% M0 y/ m9 R4 P7 U( \
2 L% o5 \2 ^; e a. P类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
: }1 [0 @ A. i. a x4 ^
) r" z9 x& W1 F! t% t }- _2 m$ CS1'=41 B1'=29 F1'=30; & v* d' ~* U( Z1 b0 L5 h* h) e1 i
! C8 S& H8 c4 ~5 P! b9 O
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
0 ~* \& G, T) E! K3 \# d; m' V% T, u, P% O) ~9 W! A2 Q# o) d4 L# J
S3'=40 B3'=29 F3'=31
/ g C' m& e: g9 r6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
7 E, V2 M: @0 f+ W% J% fS4'=40 B4'=29 F4'=31 4 g' V, q6 _# D4 u6 w3 s; w' ^# S
: B6 y" Y' M2 }4 T/ O0 g4 ~
9 X* e2 Q1 A& t& ^5 H7 a( f8 E(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
+ b: H, B% i$ A1 B9 \* R9 Y/ Q" p9 \9 ?; d j$ {$ u3 b. j* s
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
0 [* f1 [9 m/ f; V) e) @) q( ], k9 L T& t2 m0 _0 Q/ R" L6 f2 A; f, f
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 5 A" O9 w! A4 y) C
2 _1 Y$ d* i0 N/ H2 [1 ] p5 f' tF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 - B4 {& f9 H' c8 ]9 \2 p/ U
' L+ z* e+ C; K( Q: n
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?/ i( l" M$ W5 J/ _4 N% Y. ~/ n
9 E ]' p: I. D7 h. {+ ], P: r4 } Z! Z ~& n4 r
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
, E6 S3 i) `& J+ D$ n) P# X# M0 \' d+ Y4 Q6 e# g2 C S2 \
G11=B1*B'=3.15*28.75=90.56
5 ^* I. p) M+ q* {5 g( L' O- @: a
# |9 }; y2 D8 X# _G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]4 P( W4 g, f1 N( O! L
- [ v' Y0 R! B1 g- u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 \
5 Q# T1 m# g% x& {- l2 B2 o6 C* |* h W0 f7 S7 s3 A2 @. G$ i
9 T+ L, o. [; q$ A7 D& b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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