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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
( D7 U. L9 V* A- Y$ P* f/ a/ y4 p# R- a1 ^9 v! c* r+ Z& t% F* b+ E0 k+ }8 t
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
, i5 d0 a: j1 k8 O- t- V* V) y3 }9 O O1 f2 t L( X7 x
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)
( {' O2 d( ~; a, ]5 u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. [
s4 Y; t8 X/ k0 U
0 U4 d+ {5 l# v' ?- v, T& t" ]0 @) w! L( u* H% h" ?* E: e# {/ f4 m0 n/ z' U e* q
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! 2 J/ \$ J- o$ M, W2 W y* F
7 e6 Z/ _5 C5 S: K8 T8 s1 |& u/ ^6 G& D3 G) L
做下算术了: 2 i( y$ \ W: ~: {8 \" `
" e+ P: o( A- H6 G# d; a; ~' L. y! k5 F, M& W+ d
o& r5 G' w- j: X. `3 Y" Z2 N9 X(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
4 q/ R* F2 h g7 c$ g3 h4 ~. Z% R9 p0 e9 F+ w, O, h- F
(2)立博: 2.10 3.25 3.00 ( }" O9 d+ T8 E6 J1 h
* S% G, b) \, V2 d7 I; f2 E1 W(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
: w$ M- @" Y+ h ]# ] L9 l- U7 @1 I3 G. C+ ]/ a
(4)易胜博:2.25 3.10 2.95
/ E9 l$ D" o$ @4 a; j# C( Q- U+ {+ l. `) m% ~. _
# N( q" J+ h* `2 W* l3 M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
: l4 K0 ~5 c2 \: e3 }$ `5 F8 F, p$ }' ]( i% c
' A7 n2 [4 l0 H; _' q' d% US1=2.22 B1=3.15 F1=3.01
) {/ p; I% C; B7 A. m- N" y$ e/ z3 E% s0 w6 f% F
S2=2.10 B2=3.25 F2=3.00
# F: E) Q3 ^. Y: S8 Q9 X% d" E' h* p% ^# T/ X4 W2 j% ] s, ^" V" P0 Y9 p& s; i
S3=2.20 B3=3.10 F3=2.87
5 G6 m, B2 k3 K9 A' e& q. H7 B1 c9 S5 j
; W0 T3 i& r/ c0 {% GS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \8 c6 p$ V2 }2 `
8 w( d5 ` _0 H- N/ h7 V4 v
* R/ X+ B. J* V A$ B: I+ }) Z/ v1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
6 z$ y8 y/ ?8 b; h
* t% B# Q( F' J) {. Q1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l1 w. Y2 O) o- g2 Y2 [7 }- A* T- e
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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
/ A) [7 D6 r5 d3 z9 i8 ~
0 s- N$ l3 O& [0 n1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 * }5 E' x5 P( q# j. O, ]5 p
: G+ x9 Y- y- K6 r
& i" z: ?+ x/ d8 x8 l, q: rS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T! X( V: x/ s, B3 }' J+ S
- F o; Q. |3 ?4 ]* W
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
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S1'=41 B1'=29 F1'=30; + H1 c: d& B5 J& H6 u
* @% Q. L# l) v+ R5 I
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
1 b$ e& R% G% M* @) F; m' V% T, u, P% O3 m1 g, \; ^! `6 ?2 o
S3'=40 B3'=29 F3'=31
8 O7 f: H/ S3 I6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
# Y+ P( B1 c) w: j" DS4'=40 B4'=29 F4'=31 ( D. g: @% C, V3 Q3 w/ d
: B6 y" Y' M2 }4 T/ O0 g4 ~: b' P3 a5 B- `; {7 e% h/ j
(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
* o% _1 v( Z1 \* R9 Y/ Q" p9 \$ ]$ F& q- Q: r* i
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ; l, r' S" {: \, P/ }; e. j
) q( ], k9 L T& t* ~4 g4 P6 d5 U+ W1 t9 G/ u$ S
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 p- B' ?& b' V5 p% x
$ h& C: j+ E. G, t
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 4 b: H) v! Y" l) R' z* A" t
0 y$ n |% y. F0 n9 S$ k; y0 s5 m于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
( h6 d% f V( m) ^8 N* J/ \# p7 [9 E ]' p: I. D7 h. {
& _, b) g5 h+ rG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
. O4 b3 Y2 v2 ]' X6 r& g) b: h. C+ D$ n) P# X# M3 a+ |; ^+ Q/ O6 F
G11=B1*B'=3.15*28.75=90.56
8 e0 U; x) N. G) {/ Z7 }
6 `3 r7 K' I. q) l% pG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
, T' K! ~6 O$ |/ W$ f) w$ d; S! d3 v0 K" [4 H( f2 c
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 \
* s0 S/ |$ [; M4 `7 U0 I) [6 C* |* h W0 f7 S7 s3 A2 @. G$ i
+ {: E& d) A, z4 f9 a2 z" 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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