Other measures to curb the collapse of the stock markets in China. Closing today at -1.02% and -3.93%, the Shanghai and Shenzhen Composite indices brought year-to-date losses to around 10% and 20%, respectively.

The moves to stabilize markets also include cross-border swaps used to short Hong Kong stocks. The move comes after the crackdown on short selling, China is tightening operations on domestic institutional investors and some offshore units in efforts to stem the collapse.