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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
7 Y- u; G A$ g' |& u- W/ z* f/ a/ y4 p# R- a1 ^9 v! c
" b# J$ q0 H4 L' C2 ~凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
! |/ T9 D# H7 e3 M L( u+ H$ @8 a$ O0 Q) P k
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): r* }2 O& i3 w8 w: N
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. [! P! o5 s2 m/ J# U- q- o# [+ K
) x4 J$ v0 R- j9 U2 Y0 l4 t& S& t" ]0 @) w! L( u* H% h
. ~, g7 n& O" `- w4 ^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! 4 q5 d7 u3 Z2 Z
7 e6 Z/ _5 C5 S: K8 T8 s
; D% ]1 l. I1 S C+ ?2 }4 Z3 E做下算术了: 2 i( y$ \ W: ~: {8 \" `) y8 v# [4 X$ D: F/ Z) p3 G0 @
; ~' L. y! k5 F, M& W+ d
* m1 @9 ]9 x$ x, \+ v& K(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
7 ^2 x7 q$ W% d7 \& i" _5 ]' A+ G) R" N; O
(2)立博: 2.10 3.25 3.00 ) |3 V3 a v( _& x; ?
4 w; U! n v, R3 u/ K6 V2 I(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
; Q7 l& j5 ?* i/ h1 N7 f# e' p
8 X; e2 } v: _# E(4)易胜博:2.25 3.10 2.95 2 h i- i5 Y; s8 L6 L n/ @
- U+ {+ l. `) m% ~. _! \" |7 Q0 P/ R, X) B% D/ y9 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 7 s, O2 N: |3 s5 L
5 F8 F, p$ }' ]( i% c
% P" T& R, ?2 j- NS1=2.22 B1=3.15 F1=3.01 & T- w6 I* d$ P2 Z8 U' a5 K) A' g8 c
& Y! F* }+ ]1 _: o! ~. Y8 ] F+ p' @! j
S2=2.10 B2=3.25 F2=3.00
# [' p- o( c' u" ~8 ]% ~% ^# T/ X4 W2 j% ] s. X9 p" |3 \; r5 Z* w4 I" [- y
S3=2.20 B3=3.10 F3=2.87
( C2 `9 A5 s$ g2 m9 A' e& q. H7 B1 c9 S5 j l* J! D+ r, r- }. L
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \# w$ P6 t3 j5 ?' O0 I
8 w( d5 ` _0 H- N/ h7 V4 v
0 B+ H. p$ _- q: ~6 f' ~1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
8 j# Z! `8 f/ [! C: G: c5 e1 v; J3 k, O: t& _
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
" f& f, u. W6 H" a4 @2 V; z4 H6 j6 J$ ~
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' q3 k: M$ d. b: o
: {/ }$ [) n* r% X0 t) }% h& x
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
* u8 ~7 X4 i) W; u: P u: G+ x9 Y- y- K6 r
' `% w5 W5 }5 }& R0 k4 |4 X- v1 hS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T2 e+ ^, g) B5 m [2 V
) M- ?0 h* X8 b. ]: l; Y2 a- m类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j$ e, |" ]4 e+ E/ ]5 V
# U1 j: B( m5 e9 a) @
S1'=41 B1'=29 F1'=30;
! n' a% u* b* ?+ C/ F2 i0 K
$ |! w P1 @; Z6 b) c2 w& ?& v1 \1 zS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
; q3 j$ O+ N3 ]. F, Y; m' V% T, u, P% O$ t" i9 ^& \+ \, ` e3 f; O
S3'=40 B3'=29 F3'=31
2 Z8 @9 X, ?1 I2 S. W6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
) w0 M/ I1 y9 P3 Y! h/ W# C! US4'=40 B4'=29 F4'=31 . \ J9 C; i. |, K2 F i
: B6 y" Y' M2 }4 T/ O0 g4 ~
5 d; G4 o$ `- z; o+ i(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' R, s3 P7 L1 t6 t" D4 r6 n: N
* R9 Y/ Q" p9 \
3 a" Q5 Y4 ^8 z2 y$ b好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ( E8 Y9 M, s) S2 J" w! R8 P
) q( ], k9 L T& t
' X, G) m3 |" |3 NB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
% J) H2 \# Y& b, D9 p, C9 M0 N: Y
/ s4 ~) L6 @1 s, gF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
7 ?$ v |4 ]/ `* s
: D! p) S& x, N0 W, N于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?* i+ v7 M. W1 z& c
9 E ]' p: I. D7 h. {& U# `9 T! ]; t. k& E' j
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
- \9 j, z" e' w1 y* i5 B+ D$ n) P# X# M
! n) B+ c3 u+ b$ o* b; ]G11=B1*B'=3.15*28.75=90.56
. f- s$ v& E. i
9 n% _* G6 H% l/ [: B0 _G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]) Z* m: Y8 ~) |( Y# c( u
8 ?5 T' \: E0 e
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 \' p7 O: A5 l/ v+ r! B2 R5 c
6 C* |* h W0 f7 S7 s3 A2 @. G$ i% u7 ~- \( {5 v, n1 } E, O- b5 F, V
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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