The Bank of Japan is considering extending further support to the stock market, which has suffered major sell-offs amid the coronavirus outbreak, according to sources close to the matter.

The central bank is planning to increase its purchases of exchange-traded funds by lifting the annual target of ¥6 trillion ($57 billion) as part of its radical monetary easing program.

But Tokyo stocks continued to fall in trading Wednesday, with the Nikkei ending at a roughly 15-month low, as investors were disappointed by a lack of details on a U.S. economic stimulus promised by President Donald Trump to alleviate the fallout from the coronavirus.