NEW YORK ( TheStreet) -- "When you get across the board weakness like today, use the opportunity to buy into the themes that are working," Jim Cramer told the viewers of his "Mad Money" TV show Tuesday. He said today's decline in the market was a gift, and investors need to use the dip to buy into what he calls the "Mobile Internet Tsunami," a multi-year trend that could be as big as the personal computer and Internet revolutions. Cramer unveiled his new "Mobile Internet Index," a group of 21 stocks that encompasses what he considers the best when it comes to what's needed to make the mobile Internet a reality. Cramer said this index will use today's closing prices, and start at a value of 100, to tracks the performance of these great companies.
Future of Natural GasCramer once again welcomed Andrew Littlefair, president and CEO of Clean Energy Fuels ( CLNE), get an update on the natural gas industry and its prospects in Washington. Littlefair said there's been a big change in Washington's attitude towards natural gas in the past year. While notably absent from Obama's energy policy, the congressional leadership now seems to be in support of converting the nation's estimated 3 million 18-wheelers to run on the fuel, he said. According to Littlefair, making the move to natural gas for these heavy trucks could save up to 2.7 million barrels of oil per day, a huge number in comparison to the savings in the light car and truck segments. He said the concept is beginning to gain traction both in Congress, and in practice, as companys have already begun testing natural gas vehicles. Cramer said he continues to support Clean Energy, but noted the company is speculative. If natural gas gets adopted by Congress, the upside could be huge, but if not, the company's outlook is murky at best.
Off the ChartsIn the "Off The Charts" segment, Cramer went head to head with colleagues Dan Fitzpatrick and Rick Bensignor over the chart of Family Dollar ( FDO), a stock recently recommended by Cramer. According to Fitzpatrick, the move in Family Dollar is over, with the chart displaying lower highs as the big money seems to be moving out of the stock. Bensignor concurred with Fitzpatrick, noting that the stock has moved away from trend line and appears to be stalling. Cramer said these comments made him re-examine his thesis that Family Dollar's increased acceptance of food stamps would bolster the stock. He concluded that with Family Dollar now going up against tougher comparisons from last year, the bump from food stamps might not be enough. Cramer also noted that Family Dollar is still priced from a recession, and is likely to be under more pressure as the recovery continues. Additionally, rival Dollar General is set to come public soon, and is also likely to weigh on the stock. With all of these negatives mounting, Cramer concluded that now is not the time to be buying shares of Family Dollar.