In Forbes.com’s latest edition of “Intelligent Investing”, money manager and newsletter guru Jim Oberweis discusses his small-cap investment strategy, and where he’s currently finding opportunities in the market.

Oberweis says he likes small-caps because they have less of a following than larger stocks. He also says he looks for firms that are industry-changers — i.e., that are creating products or services that challenge the industry’s incumbents. “We want buy companies that have some type of unique, proprietary product that it would be difficult for somebody else to come into the market to look at,” he adds. “We look for a track record of revenue growth, of earnings growth [particularly when driven by consumer demand]. We look at price-sales ratios. We look for accelerated earnings, so really a wide variety of metrics. But at the end of the day, it all comes down to the underlying business.”

Oberweis also discusses why he thinks small-cap growth stocks are undervalued, even after a big 2009, and he talks about why he’s high on China stocks right now.