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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑# ]5 C! |! Z# M: B
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1 Y1 U6 s, q: X" T' k& T3 V! z3 I# r凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
% E# s, I8 V/ Y" D1 y0 m8 J7 }' L6 N3 e' c! j) ?
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)
% {$ E' z- q5 O2 D/ Z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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1 I/ g% ^7 E+ B X0 F6 }& t" ]0 @) w! L( u* H% h
+ S3 P! @* L) }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!
Y, t, R$ V0 G- V k! j7 e6 Z/ _5 C5 S: K8 T8 s
9 E# s- j5 S! @- w2 T1 t做下算术了: 2 i( y$ \ W: ~: {8 \" `# @9 k" r9 r8 [. f3 l: [' K2 @
; ~' L. y! k5 F, M& W+ d
) v' w) J k0 e4 F" t! O8 [(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n3 \; k* \ ~. E1 F8 x
' S: z T# G! X6 R9 t" J) M
(2)立博: 2.10 3.25 3.00 " v9 C1 ?1 O+ v+ K3 T
; j9 g) Q- T4 L+ c( F
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t: V, j- w* |: |7 |5 |
6 E+ T5 c+ r1 O4 {: {' s w" N+ }(4)易胜博:2.25 3.10 2.95 2 I) @) q5 t* g( }! y
- U+ {+ l. `) m% ~. _6 _# y8 G# L1 ?& l' Q
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 B2 K6 W8 t; c9 |2 [
5 F8 F, p$ }' ]( i% c
9 M, c4 j0 l+ [6 q/ P, A K4 bS1=2.22 B1=3.15 F1=3.01
! V0 o9 B& y+ y" ^% r- X# g* @" z' D% ?7 g8 T: M, f( _ ~
S2=2.10 B2=3.25 F2=3.00
2 M, ]' Y" [/ F9 ?# M; F6 H; k* T% ^# T/ X4 W2 j% ] s$ K1 S/ c- Q5 O" {
S3=2.20 B3=3.10 F3=2.87
* L; _5 ^# e! c4 T9 k9 A' e& q. H7 B1 c9 S5 j. s ^3 [7 O' Q6 r$ G3 Z; o
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
. r. f3 t3 e! M" i, X9 |; g8 w( d5 ` _0 H- N/ h7 V4 v0 M8 p4 m4 i4 L0 t! `& O
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
! g. K: M/ K( W8 Z8 e/ {. X& G6 Z
7 C5 T6 x4 O8 S5 G9 \4 I1/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 b- X% w$ ], z9 g, Z" q
' C4 n& c: ?8 p. y1/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
% x; X# y5 D" t7 Z4 W
. F# n9 _2 @' N% u1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
/ x5 V( b/ C: p3 v ~& Z( g/ e3 m: G+ x9 Y- y- K6 r) z0 o! B }! g, B: j
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
: A% R0 F# b+ ~* [! d* B, \: g1 ~: r# }6 h; N
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j; D: ^ G+ P0 {2 ]2 s$ B7 R
4 V3 W! p1 t7 Y% ?, M$ S/ g9 b$ _" [
S1'=41 B1'=29 F1'=30;
, C- f K1 \1 f6 ^, [* f
* j& V; P8 a- @S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s6 f0 P/ t+ m' @4 v
; m' V% T, u, P% O. j* ]8 F& c, {
S3'=40 B3'=29 F3'=31
' N9 `4 x) v; @6 S6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a. p A; b8 J+ ^; l
S4'=40 B4'=29 F4'=31 4 ?2 a! A5 \3 @, z7 q: U
: B6 y" Y' M2 }4 T/ O0 g4 ~
) x6 O5 ~8 X8 f/ h Z$ [+ k$ @(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
/ w+ ~ u9 C9 Y) g, X* R9 Y/ Q" p9 \
. n: m9 a0 l& H好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 0 U$ g, x+ Y+ I9 F1 e" ` b5 Q
) q( ], k9 L T& t7 I8 b% {( r4 N7 S. f
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
; m, N: c) V+ ~ d, o7 u1 u9 f- c0 k/ e% Y# }4 {2 C0 j
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 / t8 O# ~! P$ O1 d0 B H( o$ z
* @0 I% O) s, }* \. y于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
* c6 \: o# e1 p$ F* a9 E ]' p: I. D7 h. {6 W, W: D9 }* \; E& g- H+ x7 J' c
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
0 b7 w: Z7 q% ]( T, d% u+ D$ n) P# X# M/ P3 E3 t2 c0 H( \3 b7 T
G11=B1*B'=3.15*28.75=90.56
- u, v& [, I/ ?
& ]* U- J! O) D" X3 l \; Y8 }* G2 ~G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
$ i& h- z& K2 E7 @# w: R% J+ |$ b6 F, X% 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 \
; w6 f. Y8 ~% {* `6 C* |* h W0 f7 S7 s3 A2 @. G$ i ?: @* Q6 D E2 A: D3 W' q
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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