While growth stocks tend to be of smaller capitalizations, quite a few big caps in the IBD 50 are making the case that bigger is better — or at least just as good. The median market capitalization on last week’s IBD 50 was about $6 billion. That’s squarely in midcap range. About 10 of the 50 stocks have a market cap below $2 billion, what could be termed the small caps.