Experts told CNBC that investors should sell into any rally that emerges — and perhaps play the Russia-Ukraine gas dispute.

Jeff Auxier of Auxier Asset Management will tell you a time of trouble for good companies is a good time for investors to buy their shares. "For a long-term investor, it's a great opportunity to buy mis-appraised companies," he told CNBC.

Traders were snapping up calls in Ciena as the networking company's shares jumped more than 18 percent yesterday.

Rafael Resendes of the Toreador Large Cap Value Fund sees the stock market changing from a momentum-driven market to a valuation-driven one. He names a number of stocks that he feels are very well positioned.

The bulls outweigh the bears on options trading for Cisco Systems, a day before the networking company is to unveil new consumer products and initiatives at the Consumer Electronics Show in Las Vegas.

The promise of an Obama stimulus package has raised hopes that the battered housing sector will soon stabilize. That's encouraged investors to buy home builder stocks — but Ivy Zelman of Zelman and Associates warns investors to be very selective.

The U.S. Congress convened Tuesday to deal with what many are calling the worst global economic crisis since the 1930s. Meanwhile, pending home sales slid to a 7-year low; and even Manhattan apartment prices — once considered economically sacrosanct — fell nearly 4 percent. Yet CNBC heard from optimistic experts who say stocks are the smart investment now, thanks to great Obama expectations and moves already made by the Federal Reserve and the Treasury.

Tatsuya Mizuno, director of corporates at Fitch Ratings, predicts that the global automobile industry will remain weak for another two to three years. But he sees one somewhat bright spot amid the sector gloom.

Adobe Systems is up nearly 5 percent Tuesday — and continues to see call activity. The call buying began around a week ago, when we reported volume approaching four times the daily average for the maker of Photostop, Flash, and other popular software. Today, trading continued to surge...

RidgeWorth Capital Management's Alan Gayle thinks it's time to move up the risk gauge — in both stocks and bonds.

MarkWest Energy is up nearly 17 percent and has attracted the attention of options traders. Traders have been buying calls for the last week in natural gas company, which is near its highs of the session at $11.10 at midday. The January 10 calls are trading at $1.20.

A W-shaped recovery is more likely than a V-shaped one this year, and stocks look relatively attractive compared to other asset classes such as bonds, Juerg Zingg, managing partner at Q Investments, told CNBC.