As the name suggests, this ETF holds a market-cap-weighted basket of stocks that parallels the S&P 400 Mid Cap index, which consists of companies with market caps typically in the $2 billion to$10 billion range. This is usually a sweet spot in most organizations' existence -- after their wobbly start-up years, but before their key product or business idea has had a chance to deliver outsized growth and put the company on the proverbial map. Super Micro Computer and Deckers Outdoor are a couple of names tha ...