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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑7 {# J1 |$ z2 D$ j7 Z, }# h6 E
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
6 U# U4 Z0 \3 U' F7 Z' s. i! T
2 o/ D8 }9 {8 [4 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)# [4 @1 ]: S) }/ P6 L4 ^
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. [1 \& ?" V; z4 l% D/ n8 f
* ?' w7 c2 w W& t2 f' F' n& t" ]0 @) w! L( u* H% h
# X$ w* Z0 _) c) l) c* t( c9 l) b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! 5 K8 h* ]& _" R1 [
7 e6 Z/ _5 C5 S: K8 T8 s
~/ |0 m4 n: ^1 x2 _做下算术了: 2 i( y$ \ W: ~: {8 \" `2 T% f. F& `$ s7 k
; ~' L. y! k5 F, M& W+ d
) T/ G: e ^- M(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
. M7 F" v" w- S ] `
$ U6 u K# H' B8 e) D(2)立博: 2.10 3.25 3.00 5 R$ C- p9 C8 p0 i" j3 K
& R6 K; B4 E- S- P3 X0 [
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t2 H+ V( h# D- J9 F" N
, D! G7 E$ X, G) [" ^, m
(4)易胜博:2.25 3.10 2.95
; R" |# w7 m1 _( n- U+ {+ l. `) m% ~. _
) }0 V B" L5 R6 T* l! r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
; k# U$ |( K; ]1 W9 ~. Y# o1 c5 F8 F, p$ }' ]( i% c
( L a' p7 o" D7 s8 S6 ^S1=2.22 B1=3.15 F1=3.01
7 ?3 e2 Q) X4 S# l) U4 Y$ Y
- i) G) O8 ~9 t. dS2=2.10 B2=3.25 F2=3.00 # | S( d3 K. N2 _& Z
% ^# T/ X4 W2 j% ] s
3 _0 m1 S U/ c; o, T) J5 TS3=2.20 B3=3.10 F3=2.87
! l# t; _0 P5 W( r9 A' e& q. H7 B1 c9 S5 j Q# L$ l# C1 F
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
: w2 v( s2 k8 x8 w( d5 ` _0 H- N/ h7 V4 v# D7 Z+ [' e, W9 ?$ t; S' N E
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 # n- v, a5 ^3 [1 z6 F [+ Y( l; u
' N- d) l2 K+ U$ n3 ]6 K
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
! s# G) Y% T! m% ^' @
2 V9 j6 v+ o+ w! N( V' }1 i3 F1/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 k/ b2 J8 w/ N9 l2 v' T
( ~5 G: n/ Q- C5 l2 U
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
/ P8 {1 z1 D0 C: G+ x9 Y- y- K6 r1 G7 Z5 y* \6 }- [6 }* {6 X
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
& R) M* Q7 g/ t- T# [0 V! o- C0 j [1 M0 l1 r! m& ]5 k
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j+ }& L h; k/ c& _9 j
; ~! d+ z' h6 A" A9 V- z* R j, }% HS1'=41 B1'=29 F1'=30;
: G1 G+ X' ^+ B# R6 L, e2 e( d- ?3 U6 H) ?! ~
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
9 ~# J/ L+ _7 |; m' V% T, u, P% O% r. O& l! X6 V
S3'=40 B3'=29 F3'=31 * D5 C# n+ J8 a- _ L b
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
4 t& y. C q. y. d! ES4'=40 B4'=29 F4'=31 7 W, ^4 R; @- y
: B6 y" Y' M2 }4 T/ O0 g4 ~5 J/ G/ g4 ^& V5 g- P- p, C
(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( [. o7 [1 ~9 O5 P2 ^% Y8 n' x
* R9 Y/ Q" p9 \
9 H% D, z$ q& U" s好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 4 J% P( X, p6 D: r
) q( ], k9 L T& t) U4 A, J x4 t6 k
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 1 S7 c8 c8 ~% b2 v/ f. y& B
$ U9 N5 V+ `4 gF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
2 p8 e! e9 u$ i5 R5 k9 T4 L6 X* ?7 T7 {0 A5 R3 A: j
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
. B+ n! K1 w% ^( T& l. [9 L2 j9 E ]' p: I. D7 h. {0 [. b& [* V, W/ ?
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M/ P/ Z' s: w1 Q% P" u+ h, e
+ D$ n) P# X# M
! g) O% i, L0 g# W4 OG11=B1*B'=3.15*28.75=90.56 - T6 I$ X! w- N3 S& H+ J& U
0 u B: M/ r8 O0 i, s X' t7 N
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
0 N! Z. k1 P4 z3 A2 ?4 y6 E# w3 |3 A! s/ m0 @3 X8 u: W7 a
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 \
, X, P4 l8 _: q$ t: O" I6 C* |* h W0 f7 S7 s3 A2 @. G$ i
3 s; H) Q. v) r; G1 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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