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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
) v% g( p/ W' d' q9 i* f/ a/ y4 p# R- a1 ^9 v! c
' I. c# _6 K0 ]3 w: l3 C5 l凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
0 ]( A* o, m6 c E- F2 o7 Z& f/ S+ y: m/ P+ V( e# I3 R9 B
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): i- N/ S0 F" O! |9 |
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. [
2 x/ `9 M2 {/ f) H( M" {
+ q. g+ C1 m) M9 r+ H# M2 y e& E& t" ]0 @) w! L( u* H% h
& ~& n% @" `. o1 H- @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!
* K# N# l6 ]2 u( s& z. F& y# |/ Z7 e6 Z/ _5 C5 S: K8 T8 s
* g- A/ g* M7 ?5 ]8 B做下算术了: 2 i( y$ \ W: ~: {8 \" `
9 [9 P" Y% F: `4 h; A, N; ~' L. y! k5 F, M& W+ d
! J; x7 | r; t# }+ V o) m2 D! H, W" e(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n% P6 [# m* q! m% I$ {" C
! y" @+ M7 |5 r" N* u(2)立博: 2.10 3.25 3.00
9 F/ _; J2 u( Y7 C9 e& D' k" b* x: ]# Z; |9 w7 q( M8 Y+ `
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t+ Q* B. I0 K& r8 W
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(4)易胜博:2.25 3.10 2.95
* A4 X# U/ R- ?# E- U+ {+ l. `) m% ~. _7 Z; r; M6 _# K0 V
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
: i6 p; F$ O8 w B5 F8 F, p$ }' ]( i% c: d3 m$ h) W3 g, N
S1=2.22 B1=3.15 F1=3.01
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S2=2.10 B2=3.25 F2=3.00 1 a+ w3 Q$ c+ c7 S0 n, |0 r+ g+ [6 s
% ^# T/ X4 W2 j% ] s
2 {& ~9 _% p# ]. k5 x0 AS3=2.20 B3=3.10 F3=2.87
/ }; ^. W0 R ~( `9 A' e& q. H7 B1 c9 S5 j. K. F9 ~. u: C) }- _: l
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \! u# S+ [. W4 @0 o3 H2 H) f
8 w( d5 ` _0 H- N/ h7 V4 v
% @! D1 p; k7 `1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
1 S" @4 k* L& [% R
. [ [8 z' 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
) F* v3 a4 X/ S2 q+ ~3 _5 i1 f0 q8 [1 V6 S9 @5 N" k
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
( ]0 ]7 P( n2 l" y5 X, ^
/ ?8 ]+ s$ `) f O3 J& z1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 + Y: c; J# z0 ~# N4 M% i- x& W
: G+ x9 Y- y- K6 r" L2 ^' A2 }3 K) L) ]
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T6 c9 F- i, h" m& W& m# ^2 N6 ?: g
8 U7 e4 P; ]# _! P类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j8 Q& z/ |5 u- T7 y- q: N) g
+ a' J4 @" e" RS1'=41 B1'=29 F1'=30; 8 Y0 [4 `. X" {' \$ g( V* K, J
4 F9 w% n( W; @0 y; Y4 \3 t
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
! }* w9 j, ^. W+ e; m' V% T, u, P% O3 o. A2 k) [ r+ r* \
S3'=40 B3'=29 F3'=31
8 }& m2 u/ O6 R( |) Y+ u/ J6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a% T2 U) x* D: R) I3 ?
S4'=40 B4'=29 F4'=31
, v9 ~5 l. V# k a/ J6 M9 `! J5 y: B6 y" Y' M2 }4 T/ O0 g4 ~
: G4 t X4 w4 Y; V(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( [. o5 @: {6 w _5 G3 F R3 U' t
* R9 Y/ Q" p9 \( {2 G2 n% }) @2 P
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
7 a$ ]' N" c3 E: e. }. ^2 L; k) q( ], k9 L T& t6 N3 W: Z* l& J6 _
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
9 r+ f& e5 J: A& \% D. D5 h, h; p; L$ n
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
1 d; p% z3 y2 t T0 y# D2 O/ r# C- T6 y
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
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G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M$ e* c( Z+ O: l
+ D$ n) P# X# M1 F8 w; u0 m% @0 l' C
G11=B1*B'=3.15*28.75=90.56 5 m' U7 }; D1 D, [( |
% K$ W/ s7 C7 @3 m* `9 v
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
" m5 R6 _, f. j# S
, N% Q) }+ `5 V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 \! t% V/ U7 ^3 j6 a7 _+ S
6 C* |* h W0 f7 S7 s3 A2 @. G$ i$ d8 l1 M8 X) P6 x c# d% P
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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