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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
" a4 m& D; t7 ^# x/ }* D# ^* f/ a/ y4 p# R- a1 ^9 v! c; ?( Z# |% O" k& Y$ Y
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
) _; a0 s/ o5 M! y2 {2 x) q9 ` C5 s
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)
! c/ {0 {; O% u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. [
7 S% u. Y+ ~& e" m8 J3 m. I8 u* i
& t" ]0 @) w! L( u* H% h; }& |. z; m3 I$ @
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! ' V- c* g$ a# H; r
7 e6 Z/ _5 C5 S: K8 T8 s! \/ @' x! d5 }& n7 \3 |% R
做下算术了: 2 i( y$ \ W: ~: {8 \" `
- ~# Z# l2 |6 v# v- n; ~' L. y! k5 F, M& W+ d! T' F4 y) |6 [
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n& O k+ R( C s' H
: s5 ~) t# W9 X) V- t7 r
(2)立博: 2.10 3.25 3.00 & Y$ W+ P* O6 F9 v ]
3 k) F; I/ ]" \) l; {(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
$ m" g0 c7 L* @2 L6 Z* _
1 L0 [4 m9 \* r5 s4 r. A(4)易胜博:2.25 3.10 2.95 ! `, ~! a8 s! X
- U+ {+ l. `) m% ~. _
% Z: }% D! g0 C! B/ h) K" Q9 S. j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 7 ?& R0 T U% R7 y8 \) f
5 F8 F, p$ }' ]( i% c
# O" l! ~8 T1 ~* @) sS1=2.22 B1=3.15 F1=3.01 ' u4 N* ?+ K9 ]- b( r6 s0 ^- m
) ~" r# y6 X) B* x6 u% U" ?S2=2.10 B2=3.25 F2=3.00
' y |" m N6 S5 l r& {% ^# T/ X4 W2 j% ] s
- ]; _0 ]& V" ?. U! S$ q7 IS3=2.20 B3=3.10 F3=2.87
7 L" c9 ]/ \; m' O# E( z9 A' e& q. H7 B1 c9 S5 j
# C& Q0 M$ l. z- nS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \& R* E! C# K& q# ]! A- m. V
8 w( d5 ` _0 H- N/ h7 V4 v4 r; E" P- N1 g5 w; |% R4 T
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 6 Y/ A% N8 A$ O
5 D1 P/ C) J0 H/ K1 a1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
( N9 |, Q4 _* Z" o* R% P9 N/ R
% E; W( T9 i* _. H1/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
# K, c5 H" Z9 F" X9 J4 t+ H7 f/ D& Y: I% n. H. S% p7 z9 `
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 ( {6 V3 G7 H6 u: E, ?+ b
: G+ x9 Y- y- K6 r
, V+ B- U* u! TS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
& E0 `% N: |, G; _9 b
- p, a! j, B) k( g8 V类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
* y' n# Q; i! W9 m8 w; S
- Q! f2 f* \( J! B9 xS1'=41 B1'=29 F1'=30;
% r) O1 @5 }4 z# Q3 _4 @) G" b5 [- I+ t0 E0 z
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s6 I1 W. ^4 B4 o3 n$ B2 W- u5 L' D
; m' V% T, u, P% O' ?; o' f1 T2 q/ `
S3'=40 B3'=29 F3'=31
1 `) t7 P! N; \. R* X4 _6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a! x! ?, ^- W" \
S4'=40 B4'=29 F4'=31
, p9 q9 D. W u! T5 p. M- v: B6 y" Y' M2 }4 T/ O0 g4 ~
+ o1 R L" Q" R7 W, V+ F(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" C. w) L/ N& n, {" a$ z
* R9 Y/ Q" p9 \
0 U( w' f& {; F" s2 G8 p好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
4 w$ K- E3 S" N& C4 V$ N) q( ], k9 L T& t
# {8 c# N7 L, y; Q7 |B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
) R) g& U3 _2 V$ ]* ?5 _, l0 V; o v' {: y9 a) Q6 x1 C8 E4 {
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 # i# w) _3 ^% e: `7 s
2 ~& W! @7 Y! W* j( v于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?: S0 y3 M5 Z1 ~4 C {! E
9 E ]' p: I. D7 h. {- O J. o# M/ [2 h+ A% Q/ H
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M; a: f" k: }+ D' A
+ D$ n) P# X# M# |) K. b" [- U+ o0 m+ n
G11=B1*B'=3.15*28.75=90.56 : b @5 x5 @$ G( [' A, G
" _7 }1 y& ?, c c1 ?$ K9 R
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]5 B; j; H3 s6 r3 m+ n0 Z9 C; k
& u% Y$ A. l9 ~2 {- e) M) b
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 \
; {' D3 o; K: }$ ^% z6 C* |* h W0 f7 S7 s3 A2 @. G$ i
# {5 p% X6 E" V+ n- ^ f' d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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