*Apple says Einhorn lawsuit is misguided. *Apple says its proposal wouldn't prevent preferred shares.

TORONTO, Feb 7- BlackBerry named two wireless industry veterans to an expanded board of directors on Thursday, seeking to allay some investor concern around the level of industry experience it has on its board.

WASHINGTON, Feb 7- An extended period of low interest rates could create risks to financial stability, and policymakers should keep an eye on junk bond and leveraged loan markets for signs of excess risk-taking, a top Federal Reserve official said on Thursday.

*Silver Wheaton in gold stream deal with Vale SA. Feb 6- Silver Wheaton Corp, which just signed its first major gold-stream deal, would consider increasing its percentage of revenue from bullion to as much as 30 percent even as it retains its focus on silver, its chief executive said on Wednesday.

*Apple shares up 0.9 percent. Feb 7- David Einhorn wants Apple to "think different"... about its cash. The hedge fund manager's Greenlight Capital sued Apple Inc on Thursday, saying the company should give stockholders a bigger share of its huge cash pile.

PARIS, Feb 7- French drugmaker Sanofi said earnings could fall this year as it continues to feel the effects of expiring patents, disappointing hopes of a return to growth. Sanofi shares, which have gained about 25 percent in the last twelve months, were the worst performers in the European sector at 0945 GMT, down 3 percent at 67.27 euros.

"Our private equity portfolio and our balance sheet both appreciated 24 percent in 2012, outperforming the S&P 500 and MSCI World indices by over 700 basis points," Henry Kravis and George Roberts, KKR's co-founders and co-chief executives, said in a statement on Thursday.

Feb 7- Starwood Hotels& Resorts Worldwide Inc, whose chains include Sheraton and Westin, reported a better-than-expected fourth-quarter profit and said demand is growing in all its important geographies, including Europe. Demand in its other two important geographies, Asia and Europe, is also picking up.

Feb 7- IT services company Cognizant Technology Solutions Corp's quarterly profit modestly beat estimates, boosted by a jump in demand from Europe after quarters of tepid growth in business from the region.

Feb 7- Fund manager David Einhorn's Greenlight Capital on Thursday said it has sued Apple Inc and said the company needs to do more to unlock value for shareholders. Einhorn said Greenlight filed suit in federal court in New York to force Apple to modify a proposal on its proxy, which Greenlight believes does not conform to regulatory rules.

Feb 7- Fund manager David Einhorn's Greenlight Capital on Thursday said it has filed suit against Apple Inc in federal court in New York over a proposal in Apple's proxy that Greenlight believes does not conform to regulatory rules.

The subscriber loss was due to Sprint's wind-down if its Nextel network. It added 401,000 customers to the Sprint network, including 333,000 customers that moved from Nextel. Analysts were disappointed that the Sprint network was so heavily dependent on customers from Nextel for its growth.

Costco Wholesale Corp said January sales at stores open at least a year, or same-store sales, rose 4 percent, slightly ahead of Wall Street projections for a 3.9 percent gain. Other retailers reporting stronger-than-expected sales were the teen-oriented Zumiez Inc, which raised its profit forecast, and department store chain Stage Stores Inc..

WASHINGTON, Feb 6- Timothy Geithner, who played a lead role battling the global financial crisis both at the U.S. Geithner, who was the longest-serving member of President Barack Obama's economic team when he stepped down as secretary of the Treasury last month, is credited with helping to calm the financial storm that swept through Wall Street in 2007-2009..

NEW YORK, Feb 7- U.S. stock index futures advanced on Thursday, indicating the S&P 500 may rise for a third straight session ahead of a European Central Bank rate decision and data on the U.S. labor market.

Einhorn said Apple should issue preferred shares with a 4 percent yield, adding that if Apple issued $500 billion in such stock, it could unlock $320 per share in value.

Feb 7- Health insurer Cigna Corp. reported a higher-than-expected fourth-quarter profit on Thursday, helped by the acquisition of Medicare provider HealthSpring, and raised its outlook for 2013..

Feb 7- IT services company Cognizant Technology Solutions Corp reported a modestly better-than-expected quarterly profit as clients in Europe ramped up outsourcing, but guided first-quarter profit below analysts' estimates.

NEW YORK, Feb 7- Sprint Nextel Corp, which is seeking to sell 70 percent of its shares to Japan's SoftBank Corp, posted higher fourth-quarter revenue even as it lost subscribers due to the wind-down of its older Nextel network.