WINDERMERE, Fla. ( Stockpickr) -- According to Jim Cramer, the stock market is trading higher for some very good reasons! In a March 11 RealMoney.com blog post, he said that a year ago we used to talk about "green shoots," but now we don't even say that because we have trees shooting up everywhere. He cited some examples, such as the Baltic Freight staying strong, rail-car loadings up double digits, big increases in the price of steel and the rapid increase of rents at shopping malls.Cramer also pointed out the increase in production at Boeing ( BA), and the resurrection of Ford Motor ( F) and even of Citigroup ( C). And now Cramer sees two new trees sprouting up. The first is Caterpillar ( CAT) talking about moving some manufacturing out of Asia and back to the U.S. Cramer thinks that if Caterpillar is moving plants here, it must mean that demand in the U.S. is strong. The second new tree is coming out of General Motors. The company is about to increase the number of shifts to meet demand and could start paying back the government next quarter. Cramer said the market is moving higher for concrete reasons such as the ones mentioned above. "The green shoots are now so visible that you could be seeing a forest full of trees," he said. Recently, Cramer found opportunity in stocks fund managers need, natural gas stocks and 14 top tech stocks. Here are some Cramer highlights from over the past week as aggregated from his "Mad Money" TV show, the "Stop Trading!" segment on CNBC and his RealMoney blog posts (these blog post require a RealMoney subscription). Cramer's Stocks Fund Managers Need: Cramer knows exactly which stocks fund managers want right now. In a March 5 blog post, he wrote: "We're in one of those moments when many mutual fund managers are beside themselves because they are in stocks that are going higher but not going high enough." The Cramer's Stocks Fund Managers Need portfolio includes Apple ( AAPL) and Abercrombie & Fitch ( ANF). Cramer's 14 Best Tech Stocks: Recently, Cramer highlighted 14 stocks that could be some of the Nasdaq's best buys for 2010 and beyond. In a special report on cnbc.com, he wrote: "The smartphone revolution will drive tech's growth for the foreseeable future. It's the biggest secular growth trend of my life. So anyone who wants to play the trend should consider the companies that help to make it happen." The Cramer's 14 Best Tech Stocks portfolio includes Google ( GOOG) and Cisco Systems ( CSCO).