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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
" L* c e! u$ e3 d5 P6 l) h* f/ a/ y4 p# R- a1 ^9 v! c
1 o) D+ Q" |2 m7 {7 _凯利指数的计算方法: ( O1 m2 a L3 d; F& D k8 P" i% p) E7 I7 C, O. O3 V
1 w4 [$ {& B% @7 z7 K
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)
, J1 f7 C( f6 k- c; n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. [& ?' O/ \4 L# n3 @2 b
# P' |, Q6 u* V8 K1 S
& t" ]0 @) w! L( u* H% h
% k2 ~% E9 `1 B6 c/ m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!
; G6 h/ H; J# O7 e6 Z/ _5 C5 S: K8 T8 s* x0 ]3 o$ \6 \1 u) l/ v
做下算术了: 2 i( y$ \ W: ~: {8 \" `' B9 [9 ]% f2 ^8 F: R- O
; ~' L. y! k5 F, M& W+ d
% ?; T V1 o9 A% J(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
; m! e2 Q& E, G9 q) \9 F4 h" j% H$ _; f" q7 I# L. [
(2)立博: 2.10 3.25 3.00
& c- Z0 H U4 N' x) _' A6 d$ [$ S) L
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
: R# s+ A0 c' J, }1 S, I% D+ S/ ~3 a7 [2 {8 {
(4)易胜博:2.25 3.10 2.95 . F& B. x1 V7 t
- U+ {+ l. `) m% ~. _3 j8 E5 E: p- ^( H; V: C
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
; g% ?4 J s: Y/ K3 c5 F8 F, p$ }' ]( i% c
3 T) l/ E4 q2 A/ p& ~S1=2.22 B1=3.15 F1=3.01 ; K: s1 q& Y; ~6 E6 K
! g& n! l1 p( ?; y( f& AS2=2.10 B2=3.25 F2=3.00 4 r" R K4 b u3 B
% ^# T/ X4 W2 j% ] s
7 H3 ]3 x: W# RS3=2.20 B3=3.10 F3=2.87
1 z- w* v4 Q9 {2 G: v9 A' e& q. H7 B1 c9 S5 j5 ^" e5 \ {9 G+ o% E+ ^; N
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
7 g- A H% k4 @; A C$ W8 w( d5 ` _0 H- N/ h7 V4 v4 x* w) D7 X& Y( E
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
% u2 O) S/ c/ Q: x, U: e0 r6 [8 p2 H F8 h! q2 v
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l2 h; X2 N9 R4 N n
, ?7 A; @, {1 G* @
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
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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
. o) @2 v3 }1 d+ V& H: G+ x9 Y- y- K6 r
" w3 @7 i: ^" L5 T" j) tS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
& r2 J( T7 c! c) P# P8 i* ~$ o- j; Q( w+ A* i; l
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
2 _6 Q: V \# p$ }. m( H& H) C d0 Z# k+ w) Y
S1'=41 B1'=29 F1'=30;
\/ D" Z& {& b2 O% j5 G8 a
1 Q6 X1 w3 D( I Z+ iS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
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! v1 P3 T( `! h( I1 q: mS3'=40 B3'=29 F3'=31 ) u/ }: ~5 Y+ U% R6 {
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
; E' }/ Q; y' [! A# b7 o8 ^S4'=40 B4'=29 F4'=31
& h( I% S' ^9 i, f6 X1 Q. m: B6 y" Y' M2 }4 T/ O0 g4 ~" o/ X6 y$ ?' D) d/ ^" J. q4 d
(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( [. o8 F% t5 |1 j. X% ?3 i% O; M& n
* R9 Y/ Q" p9 \
: I$ [$ J* B! Y2 d好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 % D3 ^, Y9 c2 F D8 u1 o
) q( ], k9 L T& t
1 [5 s" r( n3 s) T2 ~. g Q, UB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 . @: P+ c0 e$ j; n
6 D2 J* `. R/ X& jF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
5 _. n B ]+ d; z
) ~4 d2 ]$ n8 q; C于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
0 t* s& D8 h. s3 C$ v3 a% f/ @2 G9 E ]' p: I. D7 h. {' g& ]) ?" k; g; I; s
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M; @& C1 z0 y0 a/ w o: G
+ D$ n) P# X# M
2 f$ q1 F J# P8 Z2 V! HG11=B1*B'=3.15*28.75=90.56 2 g+ c; D1 v/ F) h# y
$ H: O9 M* H0 L$ I5 p T
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]$ D4 R* ~- z* }" ?3 O" M
( P& J O$ P" o4 I3 K D; i
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 \
( J6 x8 D3 i; s! S6 C* |* h W0 f7 S7 s3 A2 @. G$ i! _) b y+ O& W
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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