U.S. stock index futures were lower ahead of the open Monday as investors were still reeling from Friday's news that the Securities and Exchange Commission charged Goldman Sachs with fraud.
But Citigroup could help turn market sentiment, as the resurgent banking giant reported earnings of 15 cents a share that were well ahead of expectations. Citi shares briefly gained 2 percent in premarket trading but then turned flat.
Adding to the disruption ahead of the open was continued travel chaos as the UK's MET Office forecast the volcanic-ash plume could hit the east coast of North America during the morning New York time.
The ash cloud from an Iceland volcanic eruption grounded an IMF delegation set to travel to Greece, sending the spread on the troubled nation's bonds to record levels and pushing the cost of credit default swaps higher. Asian stocks closed lower and Europe was down as well from pressure on bank shares.
Still, the losses were fairly modest, with the major indexes each indicating drops of about 0.4 percent at the open.
Goldman shares fell 1.2 percent in premarket trading, while Citigroup was flat and Bank of America was off 0.8 percent.