数据如下,还是要靠市场自身的规律了。
: i/ s( Y0 N! I% Z5 ]$ U B Q, p1 D( I
19910701 -.529 K7 b3 l: F0 w# g) l
19920701 .255 W0 C3 u' D9 a/ d1 l
19930701 -.95
( ?* r; s4 H8 L2 G3 z7 w19940701 -2.33
8 h) O7 x! G& F |7 ?. B0 T4 M+ |0 }19960701 -5.36/ z) {' W4 C( [0 z1 _
19980701 -1.70
6 K( M8 y' n0 X g19990701 -7.61
/ B# q# g7 G" u" {20020701 -1.10
8 h' f0 Y6 G2 L- z20030701 -.09
4 i$ o8 _4 M1 w2 H! P20040701 3.00
" n3 E+ k6 o$ T4 Z20050701 -2.35
2 v8 d/ [; e$ |! I6 f" g3 G20080701 -3.09/ T, @8 ~# ~0 b+ E2 U8 M6 `' x4 L+ J
20090701 1.65
6 _! Q5 q) j2 n. n" k: ^20100701 -1.02# y9 l. Q8 v2 i% X/ @2 C& E( J$ n( P
20110701 -.10( K% L7 h* Z; z4 W/ r# @
20130701 .81
. Z0 p! I1 R+ l/ ^20140701 .10 |