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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
L* s- o8 I$ ^3 [( \* f/ a/ y4 p# R- a1 ^9 v! c# G, g5 O/ U) c. E1 C
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
1 S+ j# L% { a C% E( p b, {
( g7 D) ]# O5 t3 p: q+ H/ 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)
; Z" y5 F8 M0 v: s% m% k8 A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. [
8 `' r D& H2 E0 T8 ?& g. o& n/ U& O$ g0 D& D& U
& t" ]0 @) w! L( u* H% h
6 O1 f! ], ?9 u, H% 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! . M8 n0 s) s, ? @, w
7 e6 Z/ _5 C5 S: K8 T8 s* |7 v9 w/ K A( U$ h7 N
做下算术了: 2 i( y$ \ W: ~: {8 \" `
# O( c+ \9 s8 I6 U* N# d8 s; ~' L. y! k5 F, M& W+ d
( b, Q r( } s(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n Q0 u4 G8 L& F0 H
" x# M4 e" j2 o' c2 `
(2)立博: 2.10 3.25 3.00
5 N7 d. Q- b# j5 r1 M( w+ u/ c7 f G4 D6 ~. p7 g; o1 o r( M
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
+ U0 Q3 D* a& A) y+ L: G
+ a* Q* O% ^$ O' x5 y i(4)易胜博:2.25 3.10 2.95 H2 {: w+ f' p6 P; L1 N' F
- U+ {+ l. `) m% ~. _' W% N# U% Q2 p% 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 . z; g3 Q9 k, D3 @1 R! p
5 F8 F, p$ }' ]( i% c% ~/ @" n( f7 R5 P4 n
S1=2.22 B1=3.15 F1=3.01
1 v& G* q# N% T- R s& n; N
3 T& m+ P+ v' x& Z8 |6 l! \: W7 _S2=2.10 B2=3.25 F2=3.00
3 f; x' C7 G" M) K$ h) O, Z% ^# T/ X4 W2 j% ] s4 E+ R1 D8 q; H
S3=2.20 B3=3.10 F3=2.87
5 c+ C( r; ]& ?" {1 O9 A' e& q. H7 B1 c9 S5 j
. N l2 y* H7 D4 ~- F& HS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \9 {3 S/ P% b) h
8 w( d5 ` _0 H- N/ h7 V4 v: {0 W3 k2 q! U( `! c
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
Z& S) L1 b6 x1 O( F8 Q; `0 y) a1 \6 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
+ ]7 _- c G1 c# Y4 q& ^3 }; ^* `- n, T; B% j0 l- k- ?6 u
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' q2 S# B7 J* u; n5 W
w! i. G7 k4 ?3 c+ j- C
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
* U# S; o8 t% @* T7 ~' ]. {: G+ x9 Y- y- K6 r
7 u1 J3 T6 A) w. a& |; d6 {S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T# r5 q7 i8 W' u* v$ j9 S) K8 g; x
* ~; S/ h8 i. p1 R% y& X: E# A# w
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
) m: b8 k4 H9 E& m
( x2 w: a6 O! V1 [$ A ZS1'=41 B1'=29 F1'=30;
4 l1 P; b- |9 G# T
0 }1 H3 r/ u( H% U$ j( l8 v( qS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s+ g5 a' f2 u! }. n* p
; m' V% T, u, P% O
2 d7 z/ q6 l* P! v$ m: j* IS3'=40 B3'=29 F3'=31
% t4 x2 ? X2 k1 d2 `6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a) s6 Y" R# ^& T6 Q
S4'=40 B4'=29 F4'=31 & ?9 A2 f. n* E h3 G
: B6 y" Y' M2 }4 T/ O0 g4 ~
/ R1 `0 k5 M, o, h4 [# B/ i6 X(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 [6 m. d$ N$ E, ~: W& {+ p% ~1 E* R9 Y/ Q" p9 \
* [' m) F" l) r好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
1 R5 P5 G3 {) P6 E4 c) q( ], k9 L T& t
) h0 F6 P& b; y5 F, Q6 u% M" r% n4 `B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 " q( O- l# z* W {
7 h4 h& j: |% ]: H
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 0 W8 a) b+ G: @: e) `+ F2 H
+ z3 d2 C7 D& O+ z于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
+ |. f* z; H* x& D+ Q$ R/ A9 E ]' p: I. D7 h. {
* F$ o3 a1 X0 Y2 v6 v0 eG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
" p& q4 `6 X7 ]% _6 a- m+ D$ n) P# X# M5 ~+ U9 ~4 Z5 _- w0 k% [. p y
G11=B1*B'=3.15*28.75=90.56
+ }! x6 Y2 q; ^/ N3 Q! f* d8 h1 u# d# G5 j+ u& }
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]+ r* f* o5 w1 p8 ?- N# u
% d1 I6 @: u1 H3 b6 s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 \
: ^" S1 [' s" i- {+ I' @6 C* |* h W0 f7 S7 s3 A2 @. G$ i
+ D0 l6 V- B# x& P- A& s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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