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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
6 y, j0 C# ^2 ]- X' E1 h8 y* f/ a/ y4 p# R- a1 ^9 v! c
# p i" h& s7 Y7 E凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
4 g6 k$ Z2 a! F3 [. i7 z! C7 [9 k
/ j" [4 M5 {1 E' }, f! HG3=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)) Q, o2 V' x3 _. y/ G
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. [3 n. J' ~1 Z3 ^
9 @8 s8 ]# Z5 o; I/ e+ m- ` K% P& t" ]0 @) w! L( u* H% h* I) V3 D9 Y8 \ e# g7 D1 {
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! : R8 x# Z8 w- V8 u1 I5 \
7 e6 Z/ _5 C5 S: K8 T8 s
% a! f5 \- I( L* M, E4 Z3 L做下算术了: 2 i( y$ \ W: ~: {8 \" `5 X8 V$ g3 J% A7 y9 J9 m( E
; ~' L. y! k5 F, M& W+ d
+ R' y1 u! d3 [3 x `. C$ F1 [/ E& N(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n; h6 h6 { w8 `# d9 m
6 K% f/ w( D% F, @$ X( t
(2)立博: 2.10 3.25 3.00
' }+ U5 o+ S8 j, Q9 t0 k4 H: S
! J3 a: A' B! S6 [2 J o0 e3 d(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
3 P1 x3 q2 K0 G
6 W& a; \# H+ k! S( S! E(4)易胜博:2.25 3.10 2.95
2 ]/ Z" J; x2 T) J/ y( ?* T4 X" `- U+ {+ l. `) m% ~. _
$ e* d+ T& \5 l" x! |# F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
+ T: k1 t( t; `& K& g5 F8 F, p$ }' ]( i% c) h4 R& j/ S1 D- q3 H
S1=2.22 B1=3.15 F1=3.01 4 n" ^' K0 Z5 J6 g' n' [
1 W1 c/ }! ~8 l2 I1 j9 QS2=2.10 B2=3.25 F2=3.00 8 X3 b }& g9 O. [/ ^* A
% ^# T/ X4 W2 j% ] s: R# o0 U" v, r% N( Z1 U
S3=2.20 B3=3.10 F3=2.87 ' M: [5 _7 o8 M* d/ z
9 A' e& q. H7 B1 c9 S5 j8 t4 e4 u% {: d$ G0 P9 `. I: b
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
9 A! w6 b5 r* C3 i8 w( d5 ` _0 H- N/ h7 V4 v
, h: Q4 t8 D" M1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
; a" O2 _2 g- m2 w+ |4 i- U& r, E- ?% O; ?
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) {5 F8 B+ S3 W, J$ _. i5 V! h
9 Q. F3 K& y, k2 o( g# |! ^& p
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
* O) w" `1 B5 B+ z# ~1 s1 u; v7 d, K4 v
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 7 i# l) P+ b5 r! W1 a* D* b
: G+ x9 Y- y- K6 r
, F$ D0 b! M8 j3 m" f. }4 ZS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
$ ? K2 t! c, V3 j* @3 o; |. f# E4 h* z& B# B# Y
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
# f6 X) T" t% q# O2 R7 @" z
8 F0 X' A1 O+ Q! s% q# N' w- lS1'=41 B1'=29 F1'=30;
% I/ g2 l8 ]8 m- M/ t1 c, |$ d4 H5 m$ ^# _5 B) m
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
5 Q7 b2 r$ J) s/ i3 g6 G& r; m' V% T, u, P% O a7 @5 {1 D, M
S3'=40 B3'=29 F3'=31
7 h3 y$ \; |: b% T0 t7 e* ?4 T6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
m3 t) ?, w! t1 B$ R" JS4'=40 B4'=29 F4'=31 3 l4 ], x. _4 k7 `' {
: B6 y" Y' M2 }4 T/ O0 g4 ~
. _+ q' I; z# s( o(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
, g/ C$ C d! L: x e8 \* R9 Y/ Q" p9 \" C2 W% `; I: Y! M- m3 O& u3 `$ E
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 2 S4 W/ F, @* b' M- s
) q( ], k9 L T& t/ O$ L! _" b. x
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
- S, S+ s# w0 A o( J
( f5 T8 p: ]0 Y9 IF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 : i3 n; x2 y3 Q9 M, p& _, n( U1 c
# L E4 F; T' D
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
& ~) y* k; Z& V$ } x1 r4 P9 E ]' p: I. D7 h. {% e& N# m/ D6 j" s
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M4 S: Q6 P& W# }& d& S7 m3 B' f" f$ b" {
+ D$ n) P# X# M0 h. [2 s' Y) G1 T7 {4 O! V
G11=B1*B'=3.15*28.75=90.56
$ C1 w4 m# S$ Z: W1 Y7 `8 e* g# E) h" g9 f/ I
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]5 h! d( g2 n; _0 W. K" U: F
! u/ w3 d2 E+ C) F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 \# s) n% S- V! v7 U+ s: ?2 Y+ G
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
0 m" W' E. V+ E) a O' @( M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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