Science and technology mutual funds are up 35% so far this year, according to Lipper. While they are grateful for the returns after last year’s 43% decline, even the managers of these funds are surprised by the numbers, Reuters reports. And many are worried that investors will mistakenly think the days of astounding returns in this sector have returned.

"The numbers can be a bit deceptive," Kevin Landis, manager of the Firsthand Technology Value fund, told Reuters. Landis explained that many technology stocks that were trading well about $100 and that had crashed to the $1 range are now in the single-digit or low double-digit range. In terms of percentages, these levels represent tremendous increases from the bottom but are still way below what the market once valued these stocks, Landis warned.

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