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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑+ d6 B3 D5 S8 i8 n% N
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' Q1 W% q4 \ _' M' v# Z凯利指数的计算方法: ( O1 m2 a L3 d; F& D k- h9 }' z* d6 w* b. ~. e/ U
. `0 O3 C3 o9 O) D1 G) VG3=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)
- S/ u0 S0 v) v& ?8 Y3 @5 k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. [# Z. s8 a* B; }* ~
1 r/ L- b* G9 }& _
& t" ]0 @) w! L( u* H% h3 W' G- M& |! D6 [3 A
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! 3 h! ^" o/ b6 \0 ?9 n$ p
7 e6 Z/ _5 C5 S: K8 T8 s+ O- I0 q. z/ a
做下算术了: 2 i( y$ \ W: ~: {8 \" `
6 a7 P9 }) i- A0 |) n; ~' L. y! k5 F, M& W+ d' f* b2 b p" m; r1 V7 N9 q) S" {
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n# M8 H) o7 c4 p
+ m2 V' U' }. T4 a7 w9 w: L* i0 T
(2)立博: 2.10 3.25 3.00
# _; K9 I: S% n' {9 B. \
) }3 f# a. O& K* D1 C- V(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t, Q1 H& ?; k1 G/ x7 K0 h
) B7 ~9 o+ C3 w(4)易胜博:2.25 3.10 2.95
& K: J& z8 A5 Q9 K6 C- U+ {+ l. `) m% ~. _
: ^" }) f7 `& n 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
: v+ M! M3 p7 V5 F8 F, p$ }' ]( i% c
& o! }3 J2 m- b4 cS1=2.22 B1=3.15 F1=3.01 1 a ~" @7 g, K) J) o
" R& z9 b) L. x1 [
S2=2.10 B2=3.25 F2=3.00
. a8 B1 ^# K3 I( {. J. b( i% ^# T/ X4 W2 j% ] s
& d; u2 I) T) ]- `$ GS3=2.20 B3=3.10 F3=2.87
, b& |/ o' C0 B9 A' e& q. H7 B1 c9 S5 j
- \9 P( t; g1 I0 p5 k. x5 y/ |S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \5 s/ l) U9 J6 O
8 w( d5 ` _0 H- N/ h7 V4 v( Q4 M, x1 N7 ]
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
3 x% P* [' y- A) y. O; h J" }$ X9 D1 g) O/ k" M- w
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& r' ?$ P3 X+ P0 v& h
0 c: P1 Q/ Y) L3 W1/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' q0 b& F5 L) L7 ]1 O9 j% P- x( k
+ c7 s" f; R2 h, w" E* w6 B* `
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 ) M5 X# L9 C; L, U
: G+ x9 Y- y- K6 r
& Z$ V R9 L8 J6 B0 A" R( ^1 u tS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
3 I! r1 E b9 T! A. V8 V
" E2 C- o( s$ {5 ^类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j8 d) ?$ [* F- |& m0 s
; y- v- Z; b/ O" I+ b5 mS1'=41 B1'=29 F1'=30; + x9 P9 n9 i2 ]6 u
3 m2 r7 G' S( S: u
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
2 p* M8 J3 @5 P; m' V% T, u, P% O
0 Q) j3 b1 G5 I- K4 k+ `S3'=40 B3'=29 F3'=31
) H. k; ^7 U. o, F$ N6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
) m3 ^2 x V7 O9 ]# ]; l3 bS4'=40 B4'=29 F4'=31 0 C2 M G2 e: p' |- f2 q) m0 Y
: B6 y" Y' M2 }4 T/ O0 g4 ~
S( N- g! t& i- }7 E( K(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
3 \0 T+ \! [! k p0 v- r/ n4 g. X* R9 Y/ Q" p9 \
8 L% G7 n/ z0 z( c4 c1 f* x好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
4 y7 a8 M% _$ e9 I/ G* m& ~8 w3 o) q( ], k9 L T& t
: `7 I' \0 O% G% iB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 : {. S! Y# y2 F$ R! k
2 K f% G8 |+ y( `. @
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
+ r2 r$ q- x* K4 Z. M: B; q$ Z1 p6 X) [
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?; J& l- K3 ?+ |$ ?
9 E ]' p: I. D7 h. {
; ?5 m! P' m( c" X$ C j6 {G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M3 W! \1 |3 R7 Q
+ D$ n) P# X# M
. I' i' b. t1 ~/ m' g/ C2 }1 FG11=B1*B'=3.15*28.75=90.56 6 T9 Q, r* i% T0 j
2 ?2 N$ o( M% K$ C% O4 N+ m' U: }
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]- j* q6 T1 E) c4 r
% K9 _. R- w- O4 ?5 |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 \1 |6 K8 J6 [6 C* f) \0 w
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
2 }# H1 a/ a# i4 V0 f6 d/ h3 U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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