Bonnie Herzog, a Citigroup analyst, called the announcement "very positive news."

He highlighted some stocks assigned buy ratings by Citigroup analysts.

That could help expand its 36 percent share of the $197 billion in outstanding federally guaranteed loans, according to Citigroup analysts.

William G. Bird, a Citigroup analyst who covers the newspaper business, says that 6 percent of all newspaper ads are now online.

Amazon is developing a smartphone to bolster its hardware challenge to Android manufacturers and Apple, according to Citigroup analysts.

"Alitalia is besieged by inertia, labor strikes and increased competition from new entrants and low-cost airlines," two Citigroup analysts wrote in a recent report.

According to Citigroup analysts, the annual production of polished diamonds is about $18 billion.

"With a $34-billion-a year company, one new successful product is not enough to move the whole system," said Mr. Driscoll, the Citigroup analyst.

That breakout drove John Hill, a Citigroup analyst, to issue a report anticipating more to come.

A Citigroup analyst raised his price target for the stock.