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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
2 u) z+ F- \$ s" D% A* f/ a/ y4 p# R- a1 ^9 v! c
, i5 X* f f' Q8 U2 I' Z, U凯利指数的计算方法: ( O1 m2 a L3 d; F& D k2 z, N* ?2 x! u5 e
u0 |: M! ]( m, N: @5 Q" rG3=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). h% k4 q/ P" N. Q, G6 i# H; D
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. [
; g1 v" F. w; ]3 |8 j' ]; C: h% q; U1 {" ^
& t" ]0 @) w! L( u* H% h
, j1 A. s2 h$ Q( L/ j0 d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! + I5 a# P8 j$ h0 W# @7 B
7 e6 Z/ _5 C5 S: K8 T8 s
, e1 I6 ^9 u* a. J" [, a做下算术了: 2 i( y$ \ W: ~: {8 \" `5 G$ V/ S$ B- {0 s0 g+ r
; ~' L. y! k5 F, M& W+ d3 Y3 ]7 S' j* N2 ^6 u1 {" t$ s
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n9 D) B& \- b3 w" H: u
) m3 s: n2 |2 A9 O
(2)立博: 2.10 3.25 3.00
) g2 x% J4 W. _) x/ M; o0 H0 j# q L1 u3 r) O) i9 n+ G
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t! T8 B+ M3 i, x- O5 P3 P
0 F2 w7 a0 X1 D4 c; e" ^% C2 Z
(4)易胜博:2.25 3.10 2.95
2 T J7 M9 B0 Q# H: d" [# u" x2 V6 F- U+ {+ l. `) m% ~. _( @! G6 n' ~0 g) f6 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 8 F. f4 |8 j3 j9 V+ J+ A
5 F8 F, p$ }' ]( i% c
! B, u9 b' {7 P" ]' b* AS1=2.22 B1=3.15 F1=3.01 0 x! ~; W x+ y" N/ S, _8 g0 h+ P, _
% i' s8 A% V- v/ P: l
S2=2.10 B2=3.25 F2=3.00 ( Q s! J ` b1 G
% ^# T/ X4 W2 j% ] s
" D; [- h9 k* F" f7 ES3=2.20 B3=3.10 F3=2.87
5 @; W# E3 o8 U4 r9 A' e& q. H7 B1 c9 S5 j# W3 a8 n7 _$ v: n
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \: e$ N4 q2 M- Z# ~7 t
8 w( d5 ` _0 H- N/ h7 V4 v
& }) p* w6 V" @. c1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 % c7 Q, y$ K* d& x/ c
: D! m1 o* D6 W5 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% l
, f9 j" T! t/ S, N8 Y# m) p8 `1 S+ X+ w! m
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+ }6 j2 f6 ~1 J1 S/ M
c, a: y$ q y* ]5 P& A! I
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 6 z) E [, P3 g
: G+ x9 Y- y- K6 r
4 m7 a& _& y5 g7 u+ A5 `S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
" `; k; Z. @9 _* o/ Q2 c" [
8 W1 O! W3 h# _; b' G/ X类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
1 ]. @4 ?1 W/ d( Z$ L/ D2 d& R
' _# h9 ^6 K! f3 P, {5 rS1'=41 B1'=29 F1'=30;
3 f, L3 l' ]- Y( q; |
% }5 x5 G& y7 n3 ?S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
" e6 X* t& m* F; m' V% T, u, P% O% r& p, x5 K7 y, S
S3'=40 B3'=29 F3'=31 $ H8 k( P6 Z t5 M/ r1 }, P7 S
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
1 D& c7 j; Y. [5 n6 a0 eS4'=40 B4'=29 F4'=31
x, K" c$ x! {& O W% C: B6 y" Y' M2 }4 T/ O0 g4 ~
3 N, L# p' \7 @2 C$ d# r/ ?' a: i(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" S+ `- G7 l3 t
* R9 Y/ Q" p9 \" X8 |1 f2 Y# g4 R
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 2 M3 \" `( F. k; v0 C
) q( ], k9 L T& t
& Y7 e$ F7 |- J! Y2 ~% Y9 i3 XB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
: t: l4 g* ?8 z4 |+ s" \4 P6 v* x
* @, @3 C' h. H2 g/ _6 c! AF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
8 s8 q( }' J' N8 n# _" |! J) E/ I7 V: o" ]
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?# D* A5 ~% _% a0 S2 s) g0 v
9 E ]' p: I. D7 h. {9 q3 c* Y+ D4 g- X& m( \0 ^
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M, c" o& M0 u( r, x$ T3 ]8 d
+ D$ n) P# X# M
* _0 s, Y5 O- |% ?G11=B1*B'=3.15*28.75=90.56 3 j4 l7 f ^8 l& d7 |2 m
; \6 E$ _, T0 w5 |: |
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]) [, O/ l1 v8 U n2 `
* E6 q G0 x7 }8 ~$ 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 \0 d( g9 T6 t6 q* M5 f
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
. {8 z+ T$ |* K7 e9 l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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