Opened sharply higher but dropped

Tokyo market opened higher on rebound in US market.But Nikkei dropped and broke 17,000 line again.In the afternoon, it tried to come back to 17,000 level but was not able to keep the momentum to upward and ended at 16921.

Stock Indices
Nikkei225Average O. 17009.63 H. 17049.45 L.. 16863.46 C. 16921.77 CHG. 7.31
TOPIX O. 1677.78 H. 1679.2 L.. 1656.02 C. 1660.16 CHG. -7.88 VOL. 203646
JASDAQ O. 76.43 H. 76.59 L.. 75.84 C. 75.84 CHG. -0.31 VOL. 31773
Stock Index Futures
Nikkei225Futures O. 17050 H. 17060 L.. 16870 C. 16940 CHG. 80 VOL. 130328
TOPIX Futures O. 1678 H. 1679.5 L.. 1655.5 C. 1659.5 CHG. -4 VOL. 49603