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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
) M* e5 w' E6 g; d, U8 I* f/ a/ y4 p# R- a1 ^9 v! c
- m/ u( O8 s) X) [ n凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
3 u0 C9 w# y1 U) j
" ?0 n9 C9 X) ~4 N- I3 K5 uG3=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)
3 {9 ^+ v, Z+ S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. [6 B+ R8 A* ~9 f8 ^' I
/ q! i, {3 d+ L/ S! V' _+ z6 g& t" ]0 @) w! L( u* H% h* H6 p- X2 y: a. k- t3 V
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! 2 ? k2 {6 U3 c. A
7 e6 Z/ _5 C5 S: K8 T8 s
& G2 ~7 Z! a- |/ R0 g, n& f做下算术了: 2 i( y$ \ W: ~: {8 \" `3 Y( n, @' ?" `5 t% `/ P# u
; ~' L. y! k5 F, M& W+ d" w3 d2 ]$ a J. F
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n7 f' N/ r: Y/ |9 p8 z
: q3 @7 S P# n" E+ o
(2)立博: 2.10 3.25 3.00
4 P- B3 D2 E; h/ N) e' d. y" N
4 K; ` J* m! R% C+ }+ ?: C% T0 Z' Q(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
' Q+ M' o% t/ A: i0 F n/ F z# O" w& Q1 y* X, ]8 T
(4)易胜博:2.25 3.10 2.95
8 `+ r5 F* v5 u4 `: ]1 j; C- U+ {+ l. `) m% ~. _) C# E" P% t9 X* @$ m: j6 e
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
Q- z4 t4 o6 v* s8 O7 h5 F8 F, p$ }' ]( i% c
9 p/ L$ T3 X5 \1 M6 Y% `; LS1=2.22 B1=3.15 F1=3.01 6 S0 J4 J8 R, B" E! f# K2 i, ~
+ r; A! K; B. p1 [2 o4 c
S2=2.10 B2=3.25 F2=3.00 0 Q" d2 w2 R6 @. w
% ^# T/ X4 W2 j% ] s' `8 a( r1 i6 g( B/ H! e
S3=2.20 B3=3.10 F3=2.87 3 d; }3 }7 k8 ~" Q( i( [
9 A' e& q. H7 B1 c9 S5 j% m7 p3 g, u: z% J
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
F+ H j9 j5 p. B& R# z4 v5 U6 @" {8 w( d5 ` _0 H- N/ h7 V4 v$ S( t; ~7 l' E5 O
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 - F8 T. H7 T, t" P7 u+ q U
6 |+ K8 I) t& m8 k: Q, e: n1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
- o/ ?7 f. F7 \" D8 z. C. p! R" l- N) t; {% B' U# C
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# s( V+ v1 S9 G1 @7 R
+ l" G! i: F, ?& X9 r) O
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
. }4 _( Y9 ]# I, p$ L5 Y: S( @, Q+ ^9 U/ z: G+ x9 Y- y- K6 r
. U0 g( B! D2 {+ | ?S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T/ v6 f4 T9 H) G0 Z. |
+ L6 c/ L( ~. s5 C* ]
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j& d5 v- n7 L$ k6 i( I
5 e3 n# q: P' n' IS1'=41 B1'=29 F1'=30;
) j) @2 ~5 J+ c; U3 J0 C- x( Z
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s* p: n# K( X/ o- T
; m' V% T, u, P% O# \/ C1 l1 t) V4 P
S3'=40 B3'=29 F3'=31 5 l& e0 p* t0 ^' y6 X2 ]6 f
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a# C4 Z- a1 s2 l& k# _" \8 m7 h
S4'=40 B4'=29 F4'=31 $ R& p" S5 x. u* N; ~
: B6 y" Y' M2 }4 T/ O0 g4 ~
5 f$ |. _% Z$ p. j(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
; @0 t' d7 P" R/ g* R9 Y/ Q" p9 \/ J1 G3 r; v3 }) o! j% d, z& b
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 , \- |, d' j* J+ N
) q( ], k9 L T& t
2 ]2 {4 z8 x( I) Y2 V! d' b5 @" L4 mB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 " U O! @6 R7 S1 I! r4 A$ ], e! _
! V: w" G' [" s" t, p2 a6 J, ~# C6 IF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
# k& A/ m" C* E% l% }$ q
7 l; i' u6 y9 p2 \于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
6 n$ D* u; M6 { b9 E ]' p: I. D7 h. {
4 G0 B. {4 A' G+ l0 G! l3 {G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
, s+ e Q& ?( `% d w5 E* }2 d+ D$ n) P# X# M
# u* L2 m- t' L& k8 ~G11=B1*B'=3.15*28.75=90.56 1 K9 f C/ \9 Q2 N9 m3 u
4 w9 `1 X$ E) C. P4 w& B5 h2 q J
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]; P ?9 q& _2 H6 E4 e' z# R% u+ f
2 p$ \3 Z: g' x
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 \# [( j7 u% {5 s3 A
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
& V% j) Z0 E4 a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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