Chinese mainland investors’ fund flows into Hong Kong stocks have sharply fluctuated in recent weeks, underscoring a lack of conviction to build long-term positions.

The Blockchain stock has pulled back more than 40% since tapping an Oct. 10, nearly four-year high of $23.93, but still ...

A key trading signal flashed for Applied Optoelectronics shares at a price of $101.87, after which AAOI rose over 12%.