BEIJING - China's current account surplus, the broadest measure of its trade surplus, fell 21 percent to $28.8 billion in the first quarter, the foreign exchange regulator said on Monday.

The surplus under the financial account, which measures the net capital inflow, increased 41 percent from a year ago to $86.1 billion, the State Administration of Foreign Exchange (SAFE) said on its website.

The data was released after revision, SAFE said.

The foreign exchange reserves increased $138 billion in the first three months, excluding effects of changes in the exchange rate and asset prices.