Investors frequently like to chase "hot stocks." While not based on fundamentals, momentum investing does sometimes work as stocks that are "working today" frequently "work tomorrow" as well.

So, as 2008 is 1/6th done, it's time to look back at the highfliers from 2007 and see where they're trading today. As usual, the analysts at Bespoke Investment Group have some good data and charts for us.

In a post, titled "How the Best Have Done," Bespoke analyzes the best performing U.S. stocks of 2007 and tracks them into 2008. The results:

• First Solar Inc. (NASDAQ: FSLR), 2007's best performer, is down 21.86% year to date. See BloggingStock's Aaron Katsman's article on why he shorted this stock into the New Year.
  
• The second best, Onyx Pharma Inc. (NASDAQ: ONXX), is down 49.51%.

While some solar stocks are down big in 2008 after a huge run-up in 2007, the big winners are heavily concentrated in materials, agriculture, and energy. BPZ Resources Inc. (AMEX: BZP) is the stock on the list that has done the best in 2008 -- rising another 44% so far this year.

Zack Miller is the managing editor of IsraelNewsletter.com and a former equity analyst for a leading multinational hedge fund.