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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
" d- b( F/ G$ j# u* f/ a/ y4 p# R- a1 ^9 v! c4 r: Y. S# j( `
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
. `: Y: I7 ~3 z$ [* o h
2 Z* O, u+ E! |4 g2 D0 [$ vG3=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)
% b) ]: s, o9 {( i: x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. [
5 r, S! Y3 J% x$ g8 v6 | w& p; D, p/ ^, O1 S" ^: {, j3 ?
& t" ]0 @) w! L( u* H% h3 p) B: q8 h7 O9 A2 X
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! . b6 H" U/ v1 i6 U. r. ?
7 e6 Z/ _5 C5 S: K8 T8 s4 a. g3 O, {$ j7 v' O, d
做下算术了: 2 i( y$ \ W: ~: {8 \" `; g3 X8 v3 w$ G- ~" ]9 l
; ~' L. y! k5 F, M& W+ d
, Z; B: a& N4 R+ C9 U(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n! _, y0 B- E* J2 _
* Y! t! A0 |+ @) b: @(2)立博: 2.10 3.25 3.00
% K, S" l9 m# M' @; B# m, a
9 d' W @0 G$ Y8 M1 l6 d) N# T& W(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t9 f7 g$ `' i L
* i$ _8 @4 Z) D- E# M. [, N
(4)易胜博:2.25 3.10 2.95 / o& v) w* I$ T# N' H+ S
- U+ {+ l. `) m% ~. _
% r% ]; X" i& H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
- [$ s7 K O% X& [0 R4 X. |5 F8 F, p$ }' ]( i% c
- \& o4 g' \! w$ \S1=2.22 B1=3.15 F1=3.01 # m& C9 c& x4 S, r$ e
6 _( U: F \! t) {1 E7 l2 U4 T. U
S2=2.10 B2=3.25 F2=3.00 ! V6 `, k3 j6 {. C9 }1 p6 q
% ^# T/ X4 W2 j% ] s# T0 f( {+ R5 Y% E& E; ?5 U! p
S3=2.20 B3=3.10 F3=2.87
! X4 _' B3 x3 w& r1 P5 U9 A' e& q. H7 B1 c9 S5 j" f# F' F9 f% K9 y9 {- ?, ~5 P
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
: H/ M, f! L: T( @5 H8 w( d5 ` _0 H- N/ h7 V4 v& O. {6 Q" t1 F* f: J
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 5 _+ v' O6 Z. Z5 G8 X8 r6 Z1 N
0 ]. ~; L/ {. a% p( G$ z1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
3 K: h: b2 P: |6 `, l4 T# k
/ Y* ]% T) B F& S1/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
" I" w; J+ { y+ l1 N3 Y. ^4 b
/ L% o2 |/ B1 q- e) T& I% w" W1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
3 z3 @ U h3 k6 [0 `6 M$ a/ H: G+ x9 Y- y- K6 r
& L: y+ s( F: _S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T- n5 ?3 Z! I4 k# Y9 t+ T6 [% Q8 [
7 Y2 [: E$ ^$ Z% [# c! J% o
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
4 |$ U" V( C$ Y8 L5 V9 c$ j# d2 j$ Q/ y9 _' P
S1'=41 B1'=29 F1'=30;
8 I0 j- e6 @2 S, _, q% c& O; p ]5 Z b) o7 c9 s2 L
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s! R/ r0 E% }; Z! g& q
; m' V% T, u, P% O5 R) ` P6 b' j) L; I
S3'=40 B3'=29 F3'=31
1 V8 L1 B) }6 M: y; E0 m; W6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a/ T/ X% d/ ~ O3 @: Q" W
S4'=40 B4'=29 F4'=31
2 f' {" {) s# |& M% Q9 g: B6 y" Y' M2 }4 T/ O0 g4 ~. R% d r3 g7 H z# c7 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
9 m# }; K) Q/ i- C, y# J* N. d* R9 Y/ Q" p9 \1 k: d3 ~6 p; ^6 f, Q4 @6 F
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ' u- U n$ \( a) f
) q( ], k9 L T& t
- x& ?' S) x) j7 MB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
Q. e# D3 S& A, h# H7 ] w; `. G8 r
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
( v! G- B4 m) I, `$ L3 c+ k4 G' e G. b
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
2 ^/ E0 J6 y' @1 X- c" y7 `9 E ]' p: I. D7 h. {( m. E- Y+ z& A0 `; [" M) J2 s
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M1 ^9 D9 T# y% \: c( |
+ D$ n) P# X# M
6 `7 R* G& S) H8 zG11=B1*B'=3.15*28.75=90.56
) t" B5 O0 J9 I- K) L; v, {% N, |7 @3 ?5 [7 V6 C
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
2 @ j+ ]8 _6 G+ X' w3 _2 u) u/ E0 t( Z: N6 o( a. [3 v& u" w
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 \; g; S9 C2 q$ [" ^
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
+ I# O6 U/ j- k) 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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