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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
W+ L; q1 O( q8 p* f/ a/ y4 p# R- a1 ^9 v! c
- C" U( B8 f; U, Y! g" W凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
. M* d! @) R: i: x/ }) G; B- e( k1 }
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)
, w3 `( s! D$ P, i' \. V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 w) T" k! f+ s: | Y, J3 \ j* O) f, H' ^1 V
& t" ]0 @) w! L( u* H% h
0 e& V8 m$ a6 h1 g+ v- N8 U4 V. |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! , y1 ~; E4 O% K/ s% R
7 e6 Z/ _5 C5 S: K8 T8 s
8 V' m1 M6 a) d, S* v2 j& Z做下算术了: 2 i( y$ \ W: ~: {8 \" ` c: D7 U* E; k1 d( E3 G0 S
; ~' L. y! k5 F, M& W+ d
% Y, [% X; k9 C0 G$ ~(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
3 N5 e" y8 ?& r
7 q: [' q/ K, l7 U; [0 W8 {/ o(2)立博: 2.10 3.25 3.00 2 t! V; m4 f' P+ P4 @+ G, Z( q
# [; b+ @) Y' q2 O. g6 p2 s
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t) H9 Z' t9 z( d) i
% O& F ?$ [- z! d5 u3 f: }' s2 v
(4)易胜博:2.25 3.10 2.95
6 Y9 o' u2 ]. u- s- U+ {+ l. `) m% ~. _
% }9 I. M7 Q8 K! A# e7 y) ~; k+ 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
: P! L o- Y* S9 `7 Q% N0 O5 F8 F, p$ }' ]( i% c: @. n) k8 d( n' M
S1=2.22 B1=3.15 F1=3.01 % C& c' m y/ ^0 |
' c' H: i0 ^$ N9 @! W% u$ rS2=2.10 B2=3.25 F2=3.00
+ _" ?0 k6 E7 E4 h$ Q3 }' v: B! |; P% ^# T/ X4 W2 j% ] s) z. `9 C0 x6 {. a1 w
S3=2.20 B3=3.10 F3=2.87 + m, b8 h: b- ?! T
9 A' e& q. H7 B1 c9 S5 j
/ N" K+ Z3 v; ^/ b% v' y/ GS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
: y, N2 J6 Z7 W/ [6 S1 B$ H! s- z8 w( d5 ` _0 H- N/ h7 V4 v2 b+ F0 w) I8 ~! A( Z
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 . Y8 I# g" e- X! h8 d I2 V1 U" C i; j
; F5 \9 [( n" V6 o! h
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l0 G3 G: B. u; b5 f7 C, e
}; s. V ^9 j, q. U U d4 K1/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) U8 ^1 n) ]# q1 }0 n) h( U7 F
+ h/ K5 F, D1 \ d5 C
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 7 x7 F( l" O9 k5 Q j
: G+ x9 Y- y- K6 r
# [8 d# C* X: h( f& }% lS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T1 M4 O: e9 S# @, ~% n
9 R) s& j$ r+ c类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j, }9 P) _( J8 m) z* y& K
+ C$ Y! ]5 i! \* l7 i! P/ H
S1'=41 B1'=29 F1'=30;
9 l' K. P: G; `4 b. P( [2 `- I/ j" b# u8 s5 W/ o; ]) y# c2 J+ k
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
4 s6 n* q+ @& u; H# L8 G; m' V% T, u, P% O
9 n4 W1 u0 e1 M- {S3'=40 B3'=29 F3'=31
6 l/ S% S. u/ I6 T9 p( E4 n6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
1 l4 g& j* K8 r2 lS4'=40 B4'=29 F4'=31 - P1 A+ g) P: @6 k/ }
: B6 y" Y' M2 }4 T/ O0 g4 ~
' V' t( a6 b' C+ O: J+ u7 U(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
, t a) B) U/ U" u0 t1 T" h* R9 Y/ Q" p9 \
2 I! D# V5 d! u) ~好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
- L; C( m5 d8 ^) q( ], k9 L T& t
; k) U ^0 e" n) C$ ^4 M. wB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 0 b8 i. u* [4 R! ? h$ ?
: Q! b6 d' R* o
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
& ?. l4 l/ p. c1 I2 A/ G! `" @
* H6 K# |3 f: N% ^5 l) f6 |( p+ G于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
; s+ j/ R9 P/ m9 b9 E ]' p: I. D7 h. {
. X9 f; j: y8 ^3 o6 s2 {0 V2 SG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M" Z. b! l# h! z% B
+ D$ n) P# X# M
9 b# J/ P- Z: D- W( A; g8 L. oG11=B1*B'=3.15*28.75=90.56 4 h: T1 D" A. Y( I' G8 [- o4 l
( z+ U6 B( w( k' `, F. t' H: v
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]) Q5 J) A% j" t2 A4 d1 O0 Q
# a2 ]$ J7 ^* v5 i! {$ H2 f: n
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 \3 h( j1 _: I9 n+ U" f/ T; R
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
* B8 O; o; Z; w9 [8 C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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