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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
1 q# `9 I3 V* I* b$ o; s/ q( `* C* f/ a/ y4 p# R- a1 ^9 v! c) R% i6 ?3 c& j; y; f
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
1 M+ O7 ]% P# T& s& Y% M8 d2 S B
# W1 C& j) D6 @# W) O9 E3 JG3=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)7 n: J5 x- t4 b( S; v
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. [& r7 W/ Z( B* ~: W, @. |2 ^
0 I0 H! C% m1 S2 U j& t" ]0 @) w! L( u* H% h% z' s: p$ e( w Y7 u5 o/ h% e
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! $ R L' E& g0 s. g
7 e6 Z/ _5 C5 S: K8 T8 s& e H! k; R+ u+ a6 G4 x
做下算术了: 2 i( y$ \ W: ~: {8 \" `
4 W) D7 {, B8 h$ F; ~' L. y! k5 F, M& W+ d
) E/ Z5 {. i8 {% E; j(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
9 V! a1 q5 H+ |2 P8 u1 b0 x7 Y
5 O# z0 K" o% {9 H7 `5 t! ?6 _(2)立博: 2.10 3.25 3.00 + W( V: Z% Q: W: d- P( B
( [5 r; T8 C: ^8 U2 D
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
2 J& `; i3 s& m& {( M) w) _9 G& R: ]# a( h6 u4 V
(4)易胜博:2.25 3.10 2.95 o" A3 B- R6 y. @, O0 r4 Z+ Q, {
- U+ {+ l. `) m% ~. _; k# }, z' t( j- g+ _& f
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 , k$ p/ a6 t7 k
5 F8 F, p$ }' ]( i% c# Q1 i! v1 r5 c9 ?
S1=2.22 B1=3.15 F1=3.01 : y0 g- t) A, J$ _8 _6 W8 W! _3 |
, z t3 @' z4 C) o1 I
S2=2.10 B2=3.25 F2=3.00
7 N p) @3 _% N- M4 ]% ^# T/ X4 W2 j% ] s8 f: B+ }4 \% z- @& p/ q/ Y `- s
S3=2.20 B3=3.10 F3=2.87
" t b2 n! C' x0 Q9 A' e& q. H7 B1 c9 S5 j
1 T4 z; Y5 Z6 N6 L2 @1 pS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \7 k3 c& u- C+ e( s. x
8 w( d5 ` _0 H- N/ h7 V4 v- }7 R6 s$ E7 s% ]
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
# Q* A( m5 b' b, Z3 d7 ?$ j4 n
8 f! @- j# |' T* g: {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
9 g( ?0 _1 i* p& I7 n5 B" i' z0 f
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 d/ S' N5 P+ ]+ m, t
" l; x/ p+ L2 z: N" f4 M1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
/ O) E% W; t- P! h: G+ x9 Y- y- K6 r
# Z3 f9 |% E6 K% m. uS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T( x1 ]" u0 N# X' J" i$ k! S
$ i8 \# y+ Z: |8 Q/ H ?2 w
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j& D& A! m1 V V' t' i( i( q: {
j: Y& _$ d5 S# s6 b1 Z; A
S1'=41 B1'=29 F1'=30; * X$ U8 z. s) R
/ q& {" q" v- e, z
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
* q+ R) `* Q1 _/ [. {% K$ }; m' V% T, u, P% O3 F$ ^6 M) H3 o6 L, p; I+ M
S3'=40 B3'=29 F3'=31
) y/ G6 R5 ]. O! n7 r6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a$ Q- W' c8 N* l& W
S4'=40 B4'=29 F4'=31 $ Q$ s; `- p# Z* \; I
: B6 y" Y' M2 }4 T/ O0 g4 ~: J- N5 O0 s/ |3 ]4 T
(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$ ?. G5 J1 R7 q3 d+ |+ m* g2 s8 d
* R9 Y/ Q" p9 \
8 H6 C, q# \: |# H, |8 D9 d+ ~好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 9 {) m) q: A9 a6 M* D
) q( ], k9 L T& t( o Y E# f& m& h
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
% b" P0 ~) T$ O2 ~6 c2 L3 t$ y5 k# m: z& M, y
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 ! q+ V# T' N5 Q% \0 D
' U) j0 b0 A0 E9 V1 T2 I于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?7 V8 ^4 F0 v( J; |2 V
9 E ]' p: I. D7 h. {
" q1 n0 g2 O: y! S& YG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M' w! \3 e* E/ |- r/ }5 G
+ D$ n) P# X# M
: W6 N" ^# X- lG11=B1*B'=3.15*28.75=90.56 * w6 z5 F! F+ ]* j
$ ^# r8 k1 s' ~: z! @
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ] a+ T: d7 I( {, ~
( f8 V: G) _8 Q' O& K3 L( 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 \
3 P- e9 o6 n' ~- T6 C* |* h W0 f7 S7 s3 A2 @. G$ i
; t0 U; R% p; \% |3 f$ y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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