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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑& w! k" E& ]7 O+ x& h) h7 v
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/ p3 k/ ]4 p- S7 b凯利指数的计算方法: ( O1 m2 a L3 d; F& D k4 Q, n9 C$ ]; m
& M- ]* s* E3 b1 U _
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)5 t5 D e* \" k/ @ ?5 Y
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. [
2 G9 [$ ^( Y* I7 c1 L7 _: h5 n9 N3 h
! I! K5 B5 v) y7 n8 Y& t" ]0 @) w! L( u* H% h) r" l4 O$ ~$ P4 F F& K' `; |* 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!
0 S; I% h7 s- p" [( _6 G; c: _1 J& T# `7 e6 Z/ _5 C5 S: K8 T8 s2 G5 K- L" B+ W5 D, @
做下算术了: 2 i( y$ \ W: ~: {8 \" `
3 }, S: N0 J$ d2 D; ~' L. y! k5 F, M& W+ d
+ o7 ^' h; m( p7 d. C& [(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n0 O% ?1 d2 M' w3 F( O. P6 s/ l: c/ B
( A2 o1 ]6 u: N" j& L% A(2)立博: 2.10 3.25 3.00
& C) Y+ X. x! b2 k7 }! n+ H
e. J* Q/ ^; ^) L+ a @+ q7 f(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t% R" \2 R3 S9 A. j b+ Q j4 Z5 g
! c" u; W* O) i
(4)易胜博:2.25 3.10 2.95
7 v9 c0 Y/ l* y" |2 A! r3 U- U+ {+ l. `) m% ~. _
$ K- K5 ~* ?# z1 I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 9 C* d% L4 c2 b
5 F8 F, p$ }' ]( i% c3 t8 D/ W! ?4 b" @0 k% J
S1=2.22 B1=3.15 F1=3.01 0 X' }! ~) h6 L
/ k7 @6 g$ |; s2 l- J
S2=2.10 B2=3.25 F2=3.00 2 ?4 N& L' K& z7 {9 T
% ^# T/ X4 W2 j% ] s; M2 L1 O- i" g5 M" e) w0 i
S3=2.20 B3=3.10 F3=2.87 " C: d8 r0 j" r
9 A' e& q. H7 B1 c9 S5 j
, y9 P% a6 ]9 @; d PS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \& f$ K* v5 l4 t% V K5 R
8 w( d5 ` _0 H- N/ h7 V4 v
B6 X( K4 t0 j1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 ( N# D* |) d3 R. E
* w& `& 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+ |8 ^: ^# H3 |: M
$ N! X! [; G0 Z* K) L
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
, `2 J7 j9 i" K- z; `
/ F- u, E0 f. i8 _1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
* o W- y5 o3 _7 O4 t: G+ x9 Y- y- K6 r
9 s+ Q) y1 A) sS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
; w* i7 @. b, k2 l. W
. Q, u, G$ X/ b0 Y6 x* g类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j5 Y- @. @9 j- G
6 r; e8 F% k. f+ p# N6 \S1'=41 B1'=29 F1'=30; B5 Z' U0 D8 m) Z( s
$ w1 v8 `; D K
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
# X. s, j1 i! F1 q; m' V% T, u, P% O
+ ~4 d3 S, Y' |/ B0 l" ~; k; dS3'=40 B3'=29 F3'=31
6 L7 L- |# Q4 d4 p1 D6 Q5 _6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a) u' D; T! l: V6 J1 `
S4'=40 B4'=29 F4'=31 0 `" g, U# l& z4 C: u9 r+ g: k
: B6 y" Y' M2 }4 T/ O0 g4 ~
3 F+ a+ @! l1 n& e(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( [. o0 c& U# c; L4 Y3 Z4 d* N
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ) j; J/ Y2 m+ u' p I
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
% j( t, H' e( a6 a
3 b% G7 k9 T' N6 H, Z于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
. X1 Y+ _( K1 e1 ]. z+ F/ Q9 E ]' p: I. D7 h. {* b% |2 @& ]) R# Y: j* H* R
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M1 T5 @- t+ ~: Y7 m% r; Q: X5 c
+ D$ n) P# X# M1 k) b4 q7 P1 \+ R* {
G11=B1*B'=3.15*28.75=90.56 9 m1 K! G6 o/ V7 @; N0 B
, ~9 D# F) X& n0 R+ X: eG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
, h+ n; z( \; ?3 p+ Z b$ |
7 t' t3 `; h# P O* 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 \8 Z1 t& x! H' t2 T. F& w, V
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
2 w: G* T3 J2 R1 _8 ^# T, g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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