At the Investing Club, we generally try to keep our portfolio to around 30 stocks, give or take a few. Currently, we have 32. Anything much more than that becomes too unwieldy and prevents us from doing the daily homework that's needed to manage a successful portfolio. In light of Thursday's "Monthly Meeting," we wanted to identify what we consider our 10 core holdings of the 32. The core holdings are companies we like for the long term, due to their high-quality and best-of-breed characteristics. Here are some of the qualities we look for in a core holding. The company...