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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
5 n% ]/ |% K# s; F0 i4 r$ l! _* f/ a/ y4 p# R- a1 ^9 v! c
7 N8 @, C" @9 I% x凯利指数的计算方法: ( O1 m2 a L3 d; F& D k
+ V5 @- A9 Y; c) z/ X4 G/ F
! A% T- ?- a V7 _: EG3=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/ `* E3 }4 T3 E9 r) F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. [, ?' H1 M2 w. X5 O. N
4 Y6 V" o- S) e4 l. h/ x
& t" ]0 @) w! L( u* H% h) N6 r' F0 f9 b1 |* u7 E; P* o
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! $ ~& G) [1 z+ K2 B! x
7 e6 Z/ _5 C5 S: K8 T8 s8 V, Q) T9 K9 u
做下算术了: 2 i( y$ \ W: ~: {8 \" `$ F% W# A$ B4 V. a
; ~' L. y! k5 F, M& W+ d
/ D; I. j' }' w8 x% T+ e. E(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n! i, {8 b. x }
$ ]4 ]/ Q1 @, P( b6 |9 E
(2)立博: 2.10 3.25 3.00 ' c( ?& B1 }# T, g* d
7 i' s' @; O# O! R(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
( x8 B& x- |# J8 E4 W2 G4 U$ p8 Z
6 c {1 [* v1 X! {(4)易胜博:2.25 3.10 2.95 / Y4 R5 W) x5 ~
- U+ {+ l. `) m% ~. _
2 Y- D* ^' t9 r O, H0 q7 ^ Y7 k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
5 l! [8 J& J8 K ]* r8 O. i) a5 F8 F, p$ }' ]( i% c1 K: a6 m% [4 o9 O- ]9 }2 E! m
S1=2.22 B1=3.15 F1=3.01 " d/ {; T0 n. I5 M8 C1 m. m
% u9 i6 g7 ^4 I8 `8 vS2=2.10 B2=3.25 F2=3.00
0 }1 |8 h# r) d4 a. ]% ^# T/ X4 W2 j% ] s
3 L, c: J$ l1 QS3=2.20 B3=3.10 F3=2.87 3 t3 p( O) Z( O
9 A' e& q. H7 B1 c9 S5 j
% J! P$ ]$ x" g i6 z/ f$ jS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \* u/ a: m% @4 Z n3 b {% U
8 w( d5 ` _0 H- N/ h7 V4 v
% X5 q; n( j7 Y& G+ h1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
+ D4 ]6 M, m( Z
' v. E4 w0 E4 P+ L# q- k. j P1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l' M, E3 H1 C6 V9 G! {
) U& n/ z! f" y) i2 @4 `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
6 w% X- g2 m, O% Y+ u! R( }: ~4 o/ i3 Q3 G9 O7 ], L
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
; i3 a" Y. r- S6 E/ D( ?: G+ x9 Y- y- K6 r
" z7 U, k/ Y2 L; a s' tS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T! S: X$ p! x2 Z* R' g% A
0 |* c* B! u" `6 }类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
( p/ e4 I0 m# L' E" t
+ Z" K- S% p) ]3 p& q9 J' R$ PS1'=41 B1'=29 F1'=30;
) ?, s0 A0 D& l4 e3 V* A: S, F4 @) r
* T5 I* U" ` Z3 W1 nS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
7 V5 Z; \% M% [$ _5 g; m' V% T, u, P% O
* E& j/ }1 Q+ U$ Z- ]S3'=40 B3'=29 F3'=31 * K" T/ |* S9 S3 n- B4 d. U1 L2 q$ S
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
; r6 O; F3 u4 KS4'=40 B4'=29 F4'=31 0 z1 |: [, M: T5 S* m
: B6 y" Y' M2 }4 T/ O0 g4 ~
5 b1 ~: S: \' }/ N; B r, v* 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( [. o
: S0 X2 |: t9 I4 S3 K1 z( x5 G: w* R9 Y/ Q" p9 \
' e. v; m) z. e$ t% [$ q/ ^5 {好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 - y/ b: C5 k2 a q# x
) q( ], k9 L T& t
3 i! x+ z2 f' P9 H. ZB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 % o$ V s# l# [ n, w( o) x' w
4 x7 e! I" Z0 h9 T8 P* q8 eF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 1 v2 o% C9 X5 C
/ M2 h) ]. W8 @2 H; m+ [7 G# O9 a于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
( J: ]# w! S3 B, @9 E ]' p: I. D7 h. {
0 t* d' Y7 f; ]4 b: W& ]! uG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M4 ~8 k( ?& E7 g7 N4 T; J7 o) C
+ D$ n) P# X# M
8 r9 C" }* d1 n! k: yG11=B1*B'=3.15*28.75=90.56 1 |& @ `2 W3 c8 G9 ~7 a
* l9 I' B1 G) _, [$ \
G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]8 V' n& ]* v$ ?) g! q& ^ o
8 r: [( X% Q5 U' w/ 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 \1 U2 Z: l2 f+ N% z
6 C* |* h W0 f7 S7 s3 A2 @. G$ i: C4 W* t O, G" p5 ~3 `6 u: j' 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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