NEW YORK – Citigroup's problems are far from over, but Friday it reported its smallest quarterly loss since 2007.

A sign at the Citigroup Center is shown Thursday, April 16, 2009 in New York. Citigroup Inc. posted better-than-expected results for first quarter.reports earnings Friday, April 17.

The bank posted a first-quarter loss to common shareholders of $966 million after massive loan losses and dividends to preferred stockholders. However, before paying those dividends, tied to a private stock offering in January 2008, the bank earned $1.6 billion.

Citigroup's results topped analyst forecasts. The company reported a loss per share of 18 cents, which was narrower than the 34 cents analysts predicted, according to Thomson Reuters. A year ago, Citigroup suffered a loss of more than $5 billion, or $1.03 a share.

Shares rose 6 cents, or 1.5 percent, to $4.07 in morning trading.

Separately, Citigroup said Friday it is delaying the government's exchange of billions of dollars worth of preferred shares into common shares until the government completes its "stress test." The government has been gauging the health of US banks, and the results are expected in early May.

Citigroup's revenue doubled in the first quarter from a year ago to $24.8 billion thanks to strong trading activity in its investment bank. Its credit costs were high, though - at $10 billion - due to $7.3 billion in loan losses and a $2.7 billion increase in reserves for future loan losses.

Citigroup has been the weakest of the large US banks, posting quarterly losses since the fourth quarter of 2007. But in March, CEO Vikram Pandit triggered a stock market rally after he said that January and February had been profitable for Citigroup.

It was one of the first signals that the banking industry might not be as sick as many believed. Earlier that month, fears that banks would need to be nationalized sent stocks plunging to 12-year lows.

Citigroup's better-than-expected report on Friday come after surprisingly solid earnings from JPMorgan Chase & Co., Goldman Sachs Group Inc., and Wells Fargo & Co. over the past several days. While recent results from these healthier banks have brought some relief to investors, many have been waiting to see how more troubled banks such as Citigroup have fared.

Pandit said in a statement Friday that he was "pleased" with Citigroup's performance.

"While we and the industry face challenges in the coming quarters as we work through the weak economy, we will remain focused on strengthening the Citi franchise," he said.

One concern among investors is that the strong trading activity seen by banks in the first quarter was a one-time event - the first quarter saw a surge in corporate bond issuance as the credit markets started thawing from their frozen fourth quarter. Even JPMorgan CEO Jamie Dimon acknowledged Thursday that trading activity is unlikely to remain so robust.

The question is whether banks like Citigroup can find other ways to offset loan losses, which nearly all economists and bankers agree will keep rising throughout the year as the unemployment rate ticks higher. The global recession is causing defaults in mortgages, credit cards and commercial real estate loans - and Citigroup is heavily exposed to all of these.

In early March, Citigroup stock hit an all-time low of 97 cents per share. It has since quadrupled, but remains down 40 percent for 2009. And at $4.01 a share Thursday, Citigroup stock was down 93 percent from its late 2006 peak.

Since late 2007, Citigroup has gotten a new CEO, a new chairman, and a new structure that splits its traditional retail and investment banking business from its consumer finance units, asset management, and risky mortgage-related assets. It's also been downsizing by selling off businesses and laying off a fifth of its employees. And it's gotten $45 billion in government funding and a federal backstop on roughly $300 billion in assets.