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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑/ f, O2 I- ~9 w3 S0 J6 D6 `$ I
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! i, V( {7 A$ ^( t2 m4 [凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
, K, x1 I2 D1 C* P8 q! _7 o- @$ q0 ?* P2 T2 z7 I7 O! f
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)
1 C6 ]" c9 R# G& l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. [. e8 V5 H3 V! E, F, P8 q# r
) j" m4 B" Y: }4 U
& t" ]0 @) w! L( u* H% h$ Y1 A B' F3 D8 G* 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! ! k9 e0 s# e- W$ }! S$ U
7 e6 Z/ _5 C5 S: K8 T8 s
& `. ~4 I3 D+ a8 t; M. C做下算术了: 2 i( y$ \ W: ~: {8 \" `
/ ?( y) b4 [- k; ~' L. y! k5 F, M& W+ d! g7 S7 [$ ]4 L9 i
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n6 }3 T& V: W u5 f: h
& f* D( a3 [2 g7 ~) @ M! `
(2)立博: 2.10 3.25 3.00
1 g o* @. w+ ^, P; q- M. @8 P) n6 R2 F( t
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
- j4 w. F5 c! t. ]
, {! k. ]( A$ L6 G, i(4)易胜博:2.25 3.10 2.95
2 I* \5 `+ I L9 F. z+ c- U+ {+ l. `) m% ~. _
+ ]. e$ K7 O5 W6 u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 `, X/ m! M7 \
5 F8 F, p$ }' ]( i% c
\8 b2 I- m" [% U2 \S1=2.22 B1=3.15 F1=3.01
5 ^: u: C7 e5 s6 I6 m! ?3 w: ]: |/ I; W3 ]
S2=2.10 B2=3.25 F2=3.00
1 E" A q- V: E! E$ z; f6 k# G% ^# T/ X4 W2 j% ] s
) N9 s# N& e& y, {6 q C" e) B$ b+ IS3=2.20 B3=3.10 F3=2.87
" w0 U8 B$ F9 Y$ }% C9 A' e& q. H7 B1 c9 S5 j& L& N2 K, r. G, z/ ]; ?( `
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \" d. Y7 \# W/ l; N! W2 b* r* v
8 w( d5 ` _0 H- N/ h7 V4 v8 t, |( B, L7 H! a! t$ O8 T r6 m* N
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 8 ?7 F' \1 l; ~- L7 v
7 T: S- J: M# T( x: d
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
7 R5 ]$ ^" [( Y
$ m' y6 g& G0 a1 j1/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
' G2 O+ W2 U4 e- m* ^7 a1 B, x) H7 y2 @: @# k+ @
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
/ F* ?. N6 w3 p: {, y' }/ G- P/ r: G+ x9 Y- y- K6 r
) Q# }, n: T3 }. g- I/ T* }" HS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T$ a) Q$ p- k. D# o; A* e
9 k( \: M1 q/ W4 ]8 B5 g类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j% U8 n3 U! O) o- {
! s J' j9 a2 ]1 L* B
S1'=41 B1'=29 F1'=30; 5 h. e3 I7 o* a" I$ A0 S! v
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S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s( ]# J- O# N# j8 C1 i- E3 |( |
; m' V% T, u, P% O
! V- l! f6 H- h5 W. ^S3'=40 B3'=29 F3'=31
0 a8 s4 p. z" [4 A6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
# E9 ?: C* a4 p z/ F2 X+ U4 sS4'=40 B4'=29 F4'=31 1 I/ Q" U* e! i8 k
: B6 y" Y' M2 }4 T/ O0 g4 ~) i/ S0 ^7 j0 d* V" z1 y+ |
(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( [. o3 t; B: N: G4 i5 E' T! q" a* Q
* R9 Y/ Q" p9 \0 L' ~# ?* s: ~ L5 V
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
7 ? H7 U, v4 m- T7 r- s2 i9 p) q( ], k9 L T& t* K( ?. L# c2 e: M! j0 G
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
! m X) r! h8 h" v/ C
4 l3 L' N2 d( |5 s: o* }2 eF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 7 u$ C8 s5 P; B9 N5 }
+ d6 t$ {. |; L) ^7 t$ X% K
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?2 D' Z: u, d- P' M* t6 U
9 E ]' p: I. D7 h. {
7 S* E5 n- V1 l/ r: F2 |) wG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M3 n$ `! t+ ~" M- b ~( s# v8 w
+ D$ n) P# X# M
$ j+ ~" e$ I5 W/ U" MG11=B1*B'=3.15*28.75=90.56 5 x |- @% T/ h0 ?+ |7 y. F
- b$ y) f5 w& y8 X$ w: ?$ @G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]) }/ } F8 N0 b; _0 H# T: W
l! ]4 ~6 d2 I5 h+ f# }; 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 \% g; N5 J+ b# _+ s3 Y; U) ^
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
' ]# `/ |$ F$ j8 Z# \% I) s* 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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