Hong Kong authorities ramped up sales of the local dollar as the greenback’s slide threatened the foreign-exchange peg.

The Hong Kong Monetary Authority has sold over a 100 billion in Hong Kong dollars in the foreign-exchange market this month.

Hong Kong's de-facto central bank stepped into the foreign exchange market on Tuesday as the currency hit the top end of its band for a fourth time this month, spurred by a broader selloff in the U.S.