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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
) W& S9 _: L& r; @9 x* f/ a/ y4 p# R- a1 ^9 v! c
5 {5 T. h# S/ @0 f- U7 y! z, e凯利指数的计算方法: ( O1 m2 a L3 d; F& D k) Q! S2 D( M5 t- U1 I! `
% c4 O0 U; I' ZG3=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)% t. T' p& Q/ A1 k5 T
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. [7 r/ S% O9 }' W3 p9 P
9 d' Y( Q( ?# r- V7 r% k2 I9 V9 C& t" ]0 @) w! L( u* H% h7 [/ J! B3 [& B c
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!
7 ^8 d/ M1 L# l) Q6 D! j7 e6 Z/ _5 C5 S: K8 T8 s
: Z5 e3 T" S6 e U3 T1 d; b做下算术了: 2 i( y$ \ W: ~: {8 \" `
8 L/ M+ m6 N: z% J; ~' L. y! k5 F, M& W+ d
3 r; v( v0 _( ^! q; N T" C(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
- c- p$ k$ Q5 j
6 O- |% m& ~- K& |+ }(2)立博: 2.10 3.25 3.00
. O8 @/ w' h( `# G; ~& A
" }; S) x' e4 l9 q7 p4 m(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t+ M5 u* B2 U4 ]0 N* X
6 e( @8 [/ K% A* |(4)易胜博:2.25 3.10 2.95
% @+ D- a- y9 l! P# A- U+ {+ l. `) m% ~. _" n( y5 }5 N+ r7 a
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 # C+ |3 y: s$ R
5 F8 F, p$ }' ]( i% c
- }4 A& |. H2 W, z/ kS1=2.22 B1=3.15 F1=3.01
; j& ~! y8 `1 {' J- L: @
) A; U" p+ k- G3 x/ O- Z9 F& P; }# X/ NS2=2.10 B2=3.25 F2=3.00
! Y# {* W' ^; s3 N4 x% ^# T/ X4 W2 j% ] s2 u2 o% \; p0 L
S3=2.20 B3=3.10 F3=2.87 ! B- ]& Y3 D" b0 e) T) r
9 A' e& q. H7 B1 c9 S5 j4 t5 q; q1 f+ n. r# ~9 L
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \2 t5 S' [/ P2 a6 Q9 t
8 w( d5 ` _0 H- N/ h7 V4 v
8 g) b( n9 i: U1 i( B1 _$ _1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
1 k- \* d8 g3 ~
- C) R9 c& n/ {5 }3 C* g1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
; J3 y$ f2 f+ f* Y# U) n- A9 t8 k: i$ u8 c- |6 _
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
- w& I& [% `+ ]- Y0 `' D B& @
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 1 j3 k8 t6 P4 H3 c, h3 D
: G+ x9 Y- y- K6 r) b- Z% q9 x2 r8 g. K8 c: P8 L) b
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
: v2 E/ z& Z" f2 e0 z3 }# z9 A- h2 g; }/ d+ T/ v
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j. T% w* t+ I5 _+ z( r
( a. s% w" _7 c. s' {S1'=41 B1'=29 F1'=30;
, y+ z5 ~! \! x# O: j$ g
; N3 s+ h/ V4 n6 vS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s( G$ X) L" }, b+ j9 ?
; m' V% T, u, P% O
0 w+ B& ~% d. B5 f4 N) _S3'=40 B3'=29 F3'=31 " W% X: \& |* z8 O# i9 h3 h3 Q
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
/ X9 h x( r9 w6 z# h2 N ~S4'=40 B4'=29 F4'=31
+ ]9 {( ~' y* _: D7 ]0 {: B6 y" Y' M2 }4 T/ O0 g4 ~& p; M' @2 Q9 R- r
(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
# D: x; [/ `, d* R9 Y/ Q" p9 \
- Y1 S0 X6 g' y5 Y6 U" c好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
+ C9 v2 |/ z3 r' v" j) q( ], k9 L T& t
: d; j; L; T) L% d! s% w: O" BB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 2 p% H$ v4 u2 t/ C
- ?- x, o9 y- U f- ?0 S& NF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
3 Y% {! x* t5 b4 | w2 [/ ^3 U: d5 s. ]
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
) r1 N* u+ U% c. z2 \9 E ]' p: I. D7 h. {
$ ?, D4 O d7 N1 Q8 F" @G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M/ J: o' d+ K+ e: l+ q+ P$ \
+ D$ n) P# X# M1 q7 ^) v" b$ G3 ~
G11=B1*B'=3.15*28.75=90.56 - |. K( Q; D) t. y' m
2 f2 ~' w" b, e+ v2 J. j) f6 v- X
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
8 P& {1 V' ]! D o
' Z( @6 }; C2 p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 \
% r1 n; J$ c( h/ r8 u6 C* |* h W0 f7 S7 s3 A2 @. G$ i, P* R: X, ^ x) Q7 n5 \8 z
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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