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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
5 L! O) P& C9 i& O ~' e/ ]* f/ a/ y4 p# R- a1 ^9 v! c8 k: w+ S5 M$ i/ h$ M1 G
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k1 m- l9 i, q( v4 R( H3 Y( L* u
4 I9 P/ l+ [& Q! c" w5 y& NG3=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)
6 q) a8 o3 g# o. H# @ e$ |: m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. [2 K. Z; ]! _) @& N ]( S
5 W+ ^5 |9 o j" Y& t" ]0 @) w! L( u* H% h
& o+ w/ [6 T+ e, S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!
- Q. P/ S1 D+ x( a7 e6 Z/ _5 C5 S: K8 T8 s# ~; j; t5 o! o7 e9 i
做下算术了: 2 i( y$ \ W: ~: {8 \" `7 Q6 z5 N9 }/ R5 o- L1 k
; ~' L. y! k5 F, M& W+ d m! E4 c: C# m5 F! R# I
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n% A9 e! v" X9 U! E2 G
1 |' _1 O! Q. ?* U ~2 ], E(2)立博: 2.10 3.25 3.00 n; d$ A) j* [, y0 S1 u
3 c1 k; C; ?3 W5 b+ R9 h( b(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
! L% H$ k0 s9 h+ b: t. M* S3 U2 O9 o6 B8 q
(4)易胜博:2.25 3.10 2.95
8 y! J( ~# K, Z' }! O K- U+ {+ l. `) m% ~. _0 b6 N( ^" p. v! A4 u8 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
: ~1 O0 n# R r1 z! W, i5 F8 F, p$ }' ]( i% c
' Y' T& E6 p o, O' f- OS1=2.22 B1=3.15 F1=3.01 / v9 H0 L+ f- b8 B7 S
5 ]7 p3 V7 v, m( ]* \+ ZS2=2.10 B2=3.25 F2=3.00 4 e9 g; k, }4 p% d
% ^# T/ X4 W2 j% ] s
! S6 ~# Y) R d& `S3=2.20 B3=3.10 F3=2.87 " C; V) P3 c- L: j
9 A' e& q. H7 B1 c9 S5 j
9 t5 p# t4 m7 FS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \6 s, C8 C* R4 c7 ]
8 w( d5 ` _0 H- N/ h7 V4 v
) T- n4 X# ]) ~& X2 [1 R2 @1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
: {* a; }( y/ c( z. N& u1 t5 i- I* S/ y! n8 b" \3 q7 Q6 {
1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l8 H$ a( V$ b( L% T. I
9 A' P' C/ K7 l' O1/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' q8 J2 } G f( p0 K" }% @
: `5 Z/ U; F$ q6 B) Q' v/ \ B5 G
1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
4 }1 y1 t; f1 o$ d: G+ x9 Y- y- K6 r
, `- I. a' L; P2 T' |S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T1 G# L2 [/ l* c' @4 W
! P5 V8 o7 |" K0 U
类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
+ X2 o& e2 m$ a. N0 A1 H' [1 \2 u9 E" N: y
S1'=41 B1'=29 F1'=30; 6 k/ l+ @6 `5 ]4 L) i
8 J+ i; d" t$ m/ S8 lS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
8 Z6 _3 w3 T( l- E0 R, Z; m' V% T, u, P% O
1 J6 v R' S/ o; I- v2 _! {S3'=40 B3'=29 F3'=31
' U [, \+ T4 z% f) P6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
6 j( W$ T, Q/ _1 ?+ r1 nS4'=40 B4'=29 F4'=31 % ]0 ?9 s& ~9 w; K# P& Q- ^
: B6 y" Y' M2 }4 T/ O0 g4 ~6 A3 Z4 @* z4 h* j3 U; Y3 V4 S
(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
; X8 l) Y$ o5 }2 ?$ q3 p( Q* R9 Y/ Q" p9 \
8 C% @5 U$ v7 G" y0 N7 w* _/ l好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
1 i( y# w5 A. x! M) q( ], k9 L T& t
( v# a5 e! P1 k9 y4 m* UB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 4 P' v/ f5 V- ~% E: `! L ^
: T2 l7 e3 T4 L
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
# P3 p4 N$ o) t( |
0 k8 |) b# F( ~0 h6 W3 p% ?, u( d于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?6 w% ^1 F9 B) n p7 ~! L
9 E ]' p: I. D7 h. {
1 H+ M+ ^( V: h# l) gG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
4 p8 M7 H- R+ h7 O( M3 P+ D$ n) P# X# M% _ c9 a7 F$ x% q+ R
G11=B1*B'=3.15*28.75=90.56
+ p/ T& A: ^% @9 R' P$ z
' k0 q9 t9 }) q* g' XG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
. z0 F3 n+ i' E" E3 u6 G+ R6 N8 ?/ N7 Z2 ^8 `+ Y2 G w
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 \, y; ^. n' U* }7 i- y( B! i7 A0 ^4 H' N* ?
6 C* |* h W0 f7 S7 s3 A2 @. G$ i
/ ]! u6 ~* _3 }/ N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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