By Zheng Buchun

A-shares moved up slightly Thursday but with contracted trading volume. Shanghai Composite closed 0.07% higher to 3275.96 points and Shenzhen Composite 0.38% higher to 2014.67 points.

Last week, there was some good news. Specifically, President Trump on Wednesday said he would not label China a currency manipulator, which is good to the market. In the following months, China will negotiate on trade agreements with America. And that is what should be closely watched. In addition, China's exports and imports in March rose by 16.6% and 20.3% respectively year on year. That combined into a March trade surplus of 23.93 billion U.S. dollars, compared with February's $9.15 billion deficit.

Despite all those good news, the performance of some A-shares is hard to explain. Though the losses of Pingan and Industrial Bank turned mild, new stocks such as DMG media BoomSense were sold into correction earlier Thursday morning.  

Investors have to fasten your belt. Massive selloffs often signal a gloomy outlook for future trends. If selloffs become more frequent, it might be time to leave. If it only occurs occasionally, you may hold some of your positions and wait for a little while. 

(Zheng Buchun is NBD's columnist)

Email: tanyuhan@nbd.com.cn