These stocks have some qualities Buffett likes to see but are too small to be Berkshire investments.There are some characteristics Warren Buffett looks for when selecting stocks for Berkshire Hathaway's (BRK.A 0.74%) (BRK.B 0.86%) portfolio -- stable cash flows, competitive advantages, and good management are some examples. But he also needs a company to be large enough to make an impact on Berkshire's portfolio. In this video, Fool.com contributors Tyler Crowe and Matt Frankel discuss two stocks that could ...