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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
7 `. k% R" V4 i8 i, p* f/ a/ y4 p# R- a1 ^9 v! c& _. K" l! J5 y) N
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k0 @* Z9 w' [0 w
/ p) `) D/ w! X8 c4 L8 N2 {8 tG3=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 [6 z/ E* {9 }- J
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. [
, P4 ?: f) M- x7 G# |4 @' e0 g
% p$ m8 z: Z n! i' L& t" ]0 @) w! L( u* H% h
2 w0 @, I6 {- U4 F7 I: l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! : J9 Q1 r( K! p9 N# v4 w
7 e6 Z/ _5 C5 S: K8 T8 s
, K. z( {6 F2 q! t* }$ n做下算术了: 2 i( y$ \ W: ~: {8 \" `
5 L% ^6 {) w$ D; j6 w: j! D; ~' L. y! k5 F, M& W+ d+ w' J$ U- c' H! ~& Y. D6 b; l
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n7 T9 P! p# c# G6 E( d
7 _8 q W7 J8 o* D9 ]" U% ~# i(2)立博: 2.10 3.25 3.00 " I# {+ n' Y7 R5 r
* B; B5 j) L; P2 N+ V: B' d(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t' a( C5 F! t/ `7 |8 e6 z* Z
* D4 C% R" G5 J* {
(4)易胜博:2.25 3.10 2.95 1 \2 f- j( q0 h* \
- U+ {+ l. `) m% ~. _9 \: Z' z8 O7 d- T0 n; @ q* Y
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 , X& U/ A2 e6 [; W$ T
5 F8 F, p$ }' ]( i% c8 h0 j" a' @$ W# t7 {) K. M& h" Y
S1=2.22 B1=3.15 F1=3.01 & C7 G' O$ Y0 C2 h: b# I: P
3 |$ w' L. {/ E: }/ K* r# f3 G
S2=2.10 B2=3.25 F2=3.00 0 M: ?0 ^$ e$ x/ H
% ^# T/ X4 W2 j% ] s9 `- O4 T1 s* t( q! M4 z
S3=2.20 B3=3.10 F3=2.87 : f! t7 j! S0 [; V7 ]6 f9 [
9 A' e& q. H7 B1 c9 S5 j! [) H) h+ k. }& o* V% B
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \. \; H9 e" \9 U$ y! u, G. L
8 w( d5 ` _0 H- N/ h7 V4 v2 Q% h8 G, k% x# |+ {" h) w1 v
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 2 q/ j1 u3 j$ d2 ^( |, i
" ?% C1 x! V0 e) O9 x8 L
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" ^: g+ I$ `4 b, @% Q9 X
* t0 {8 Q+ M) T$ b: H& x# }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 q) L8 e( @3 e- J8 S- h+ X
% Y" L! Y% a7 y/ \+ d2 {
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 . H/ `' N) X- s
: G+ x9 Y- y- K6 r
% d- F4 |" Q3 |# uS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
7 J. e1 r$ b" { V8 d" @1 D" ]/ R$ L$ C' H- j: |
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
/ t9 _% o2 b$ O
( O5 O! G+ m5 G" @- lS1'=41 B1'=29 F1'=30;
# T$ ^# ?9 f7 B9 s, g# N1 H) Y5 x( _
. X* }: O4 w* k$ k. q D" GS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
; D* z; y1 V* `; e0 p" d9 i; m' V% T, u, P% O: {% i) ?) e2 o: `5 f$ h }
S3'=40 B3'=29 F3'=31
. r$ c! Y, q2 B6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a1 | l/ X+ }! k1 ~- C8 e
S4'=40 B4'=29 F4'=31
+ L, Q' W- J. ?& n% I; e A: B6 y" Y' M2 }4 T/ O0 g4 ~
) N2 v* W r x o) u(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$ I% l$ g9 M. o* o
* R9 Y/ Q" p9 \7 r, H$ B8 {1 b$ X5 W. e8 h
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 1 A% l; n' h! K1 g( I
) q( ], k9 L T& t% {. `1 P0 T; _
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
9 v2 }* v- ^ r# v; |1 o8 i
" R, Q& o7 |, P0 i0 b" ]. @% aF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
# p9 X: P; q* H% w; O5 I0 k/ h; E# H& } }1 o1 t1 Y8 ~/ O, r
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?/ B! D, b! p3 _; c( \
9 E ]' p: I. D7 h. {
& E9 y/ {; v7 ~# H: cG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
0 v a' C/ g5 H2 r3 [+ D$ n) P# X# M
) H+ U& ~& X% o% {G11=B1*B'=3.15*28.75=90.56
% o2 h$ v7 F! \1 g4 y6 \
: j5 I" Z8 ^8 ~0 S& B7 V5 qG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]7 S- t* g5 i2 n. L6 \; f* h
8 K' C6 W7 h/ ^' K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 \
& H- d6 v, O1 q* u) V- E% ]1 W6 C* |* h W0 f7 S7 s3 A2 @. G$ i
3 F8 m& t3 P* c6 G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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