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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑, Q: y+ C; K% `
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, h" l. A, U' x$ f- S5 v凯利指数的计算方法: ( O1 m2 a L3 d; F& D k7 e6 \" P! H: J5 H( w
( L- v- G: u& UG3=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)5 e! g) t& ?- Z% Z2 W: Z2 x1 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. [8 V: j6 K. L9 x' j. \
; |( `7 X0 _' j* m5 y$ o& t" ]0 @) w! L( u* H% h
( T9 w J8 ?, B) D) S1 [+ O! `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!
0 _: V# A1 H9 h; r( _7 e6 Z/ _5 C5 S: K8 T8 s. }. e$ D+ E8 [/ W9 \
做下算术了: 2 i( y$ \ W: ~: {8 \" `
$ w5 F4 `. T4 K8 b# N1 v% ?; ~' L. y! k5 F, M& W+ d$ @; d. G6 S: l# a, a; G# p
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
, X" `$ B: u% |! u7 t' E- C" P2 S! Y/ G4 j1 n. N ?
(2)立博: 2.10 3.25 3.00
+ J. o; J X9 p) |$ u) S- ~. z# K1 l5 r9 {
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
$ y/ k! w( v% L) y# |$ M( B% P0 H! {. W
(4)易胜博:2.25 3.10 2.95
+ f* I; o* h+ q: B4 w. j; O+ f- U+ {+ l. `) m% ~. _; V& {9 A- v( m; 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 1 f3 D5 z. _- S% B, x" y- _
5 F8 F, p$ }' ]( i% c
0 j& m2 R& w) t1 N d/ f" P; GS1=2.22 B1=3.15 F1=3.01 3 ^8 { |: v; O7 m: w
4 Q/ f" g5 }2 `
S2=2.10 B2=3.25 F2=3.00
+ ]/ [% m! h; j- P' [% ^# T/ X4 W2 j% ] s1 J+ h; v" m4 `: g* L& _) r. u- u# e
S3=2.20 B3=3.10 F3=2.87
3 M, @! @! M. e& _5 i1 i& t, a9 A' e& q. H7 B1 c9 S5 j
0 b0 H1 w m& i' l7 LS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
6 m; `, a( H8 Z8 w( d5 ` _0 H- N/ h7 V4 v, W. N0 D: J* o) X6 W
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 % k+ k q5 G# m5 C( G/ Z7 N
) Y+ l0 H% v+ i9 F t3 N9 k! ] Y
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
4 v! F6 X4 t% \( ]( e9 F+ l
' n# k- S! P# i$ x0 a8 }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
# ]% {2 M( Y! M. ^ S, u1 @8 {4 R. _- G1 V" h
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
* a' O2 k4 ^# X" [ G! ^& d: G+ x9 Y- y- K6 r
! \6 t. W. r, i1 ]/ N7 `# NS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
* n" A6 L/ }, g f0 g* w
d$ H2 m3 k) F1 g) V) w( Y; g- ?类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
% p) Q1 C7 \' ^) y; u& ?3 s, p; G4 X W
S1'=41 B1'=29 F1'=30;
- s( T) L/ h/ Y8 T5 d: y# c+ L) c/ r/ s( \0 Q7 H5 i
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s I, N+ t) j3 {" M8 @% C3 Q: ~
; m' V% T, u, P% O0 R& [; m& X: x0 D# g% N
S3'=40 B3'=29 F3'=31 0 {7 O1 d Y8 Y# V6 p
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
$ @- d3 i; q% l4 ^S4'=40 B4'=29 F4'=31 - C, v5 N k4 t' `* _& f* f( S7 h
: B6 y" Y' M2 }4 T/ O0 g4 ~8 \ \6 J3 O. y, G7 s+ w% M
(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( [. o6 _) l1 t7 ]" g. P
* R9 Y/ Q" p9 \4 W* o4 N9 v) A c) I' i Z2 R
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 6 q. O! x" \2 H$ L& g& m# r/ x
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/ R T) y3 l9 {& ^! a" aB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
9 P5 C2 }3 w+ |/ K& }
$ F1 c0 k: ?# HF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
* W" V- D* ]6 x0 }/ m3 `& v; {8 I, R! ?: {/ L! v
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?+ |! j+ x X& b6 g: z2 F3 b8 F; P
9 E ]' p: I. D7 h. {
/ |! z' v1 S$ r# ]; A0 Z' N& MG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
) e/ I. S: e+ b1 B8 q+ Z- w! J5 l+ D$ n) P# X# M& u# Q! T( O1 d* ^ M; i: i
G11=B1*B'=3.15*28.75=90.56 0 D& c& t$ `' c, U/ G4 Z
: ?8 t$ _4 m* G7 a& I8 zG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
) U6 B+ M/ }; M- Q) x- J3 J" X1 }6 O$ r* H O
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 \0 w: h' i; O- g% @ G
6 C* |* h W0 f7 S7 s3 A2 @. G$ i4 z% u e# b5 ^1 w, W; 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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