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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑$ a4 @! n- q1 [% Z" i" l
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. m% C; Y- {# q; m凯利指数的计算方法: ( O1 m2 a L3 d; F& D k; t9 V. M3 z' s! r l! \
$ i6 B. w, y' i8 F+ q
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)
: I6 \* X* C0 w, E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. [
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7 t- I `/ G' E) Q6 g& t" ]0 @) w! L( u* H% h% b8 _& n8 n$ d0 g0 ~+ G
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!
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' E: V, |8 ?* y# n( W4 T& [5 R做下算术了: 2 i( y$ \ W: ~: {8 \" `3 X3 F) k8 l! p
; ~' L. y! k5 F, M& W+ d5 ^4 u, {0 r! f, g5 E$ [& i
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n# n. Y! |- |3 Z; f% R! Q& G
" z+ I* `& j0 G
(2)立博: 2.10 3.25 3.00
* l% K9 O6 c' O1 z1 H$ v" \2 P# y, \ ?' M; n5 S
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
" a7 m" S! ^: U6 W1 T8 Y( {
: \+ r1 G4 W: V3 u3 X(4)易胜博:2.25 3.10 2.95
+ t- @# h! a g* k# U- U+ {+ l. `) m% ~. _
+ i, f3 \: H6 Y5 K2 Z+ 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
6 I: ~+ x" L: c- O5 F8 F, p$ }' ]( i% c
( g# Q6 [6 `" [% g/ Y+ V/ zS1=2.22 B1=3.15 F1=3.01 + g# [8 t4 t2 R9 m
; l" v( P& k8 m: u- _+ F: r OS2=2.10 B2=3.25 F2=3.00
, ?/ w; `, P+ b& W, V" M/ x$ |% ^# T/ X4 W2 j% ] s0 W( K5 s) R0 e; J0 t# {& }
S3=2.20 B3=3.10 F3=2.87 % W* A, r" ^' Z7 [
9 A' e& q. H7 B1 c9 S5 j
$ @+ \3 e& Y% w, E( `5 m* b' t2 ~! u) xS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
) S. @- e, C; B: O: d" ^/ N8 w( d5 ` _0 H- N/ h7 V4 v
1 d: D8 B- S/ L1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
8 \8 d: N. o6 x0 }- [$ a4 \$ v1 y6 ]- l- c2 }; Z/ J
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
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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- j; p& q' c9 j# {1 \: E3 n
4 u2 {9 w7 ?1 O1 t. e6 \$ ^
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
& Y( A8 X* L a: G+ x9 Y- y- K6 r% [! K" k- V$ F) s; D: G+ c
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T" I* k k. t( I$ T$ @8 n
7 s+ ]9 l. c/ U1 K! }类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
9 b2 v4 I& L4 i2 {& a: Z* o! a1 F% S* q" e1 W7 U" @
S1'=41 B1'=29 F1'=30; 9 f" A% Z4 O, H9 P. S; o# {" V; S! o
6 K6 K0 v2 i z4 \* Y6 }; QS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
% y2 i" \" C9 |; m' V% T, u, P% O
# z- ]* L1 g1 xS3'=40 B3'=29 F3'=31 " u3 `+ C" Y3 T2 o
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
8 w& s$ k( D, L5 b: e) mS4'=40 B4'=29 F4'=31 ) t; s @4 w2 m- @5 I" m4 r
: B6 y" Y' M2 }4 T/ O0 g4 ~5 E5 B# A1 Z# ~: P1 v v( ]: W2 t, 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( [. o3 e- T1 w# Q9 g* ]$ i& T
* R9 Y/ Q" p9 \
, F' q2 P& g, F* J9 w好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 " t) Q% t8 a6 q1 B
) q( ], k9 L T& t
. j. v, x+ G9 n! ^1 AB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
" N7 `* U* ^6 u" B7 |' G+ y' e
' N! l+ K5 R6 J# B2 Z4 ^# _' NF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 2 F6 D: Y4 J5 R2 a+ |
$ w9 r2 M o# c- X3 E! ?于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?: V! e1 m0 w* ^1 }: A- a9 Q+ N
9 E ]' p: I. D7 h. {
: f6 }6 X t6 v% P6 JG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M' O2 d: }: \/ W
+ D$ n) P# X# M
4 @! I, z, A$ q! {G11=B1*B'=3.15*28.75=90.56 8 U2 z; G( n7 \. ~# n/ s% [
) r& d9 V. X- q8 W j" S' j) }7 }8 kG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]- \9 X( N0 F h: n; v* V
- z" L% l! M. \
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 \" z% x) i- a- C6 i5 P% A+ |
6 C* |* h W0 f7 S7 s3 A2 @. G$ i' M$ ]$ j9 W8 {. C0 ^% n8 U
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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