Big banks’ demand for central bank cash remained very strong on Wednesday, leading the Federal Reserve Bank to add a fresh $100 billion to the financial system.

The Fed added the money via what’s called an overnight repurchase agreement operation, or repo. Eligible banks, called primary dealers, sought $111.48 billion from the central bank, exceeding the $100 billion cap the Fed places on overnight repos.

The heavy demand for Fed cash reprised the strong interest seen for Fed money on Tuesday, when the Fed added even more money to the financial system. As of Wednesday morning, the total amount of Fed repos outstanding held steady from Tuesday at $195 billion.

Repo outstanding levels had been falling over the recent weeks, but have ticked up over the last two days, although they are still short of the $255.62 billion that was outstanding on Jan. 1.

Driving the demand for Fed repos are highly unsettled markets, as traders and investors try to respond to the coronavirus and its potential economic impact. Treasury yields have fallen to historic lows and the Fed implemented a half percentage point emergency rate cut on Tuesday that also impacted trading and money market conditions. Some market participants have pointed to a high demand to hold Treasurys as a force pushing up short-term rates.