The stocks of some great companies are on sale right now. Well-known businesses and top brands have stocks deep in the red this year despite all three U.S. stock indices trading near all-time highs. With the current rally in equities concentrated in only a few names, many stocks have been left behind.For investors, particularly those with long time horizons, the current situation presents a buying opportunity. A lot of great stocks are down substantially right now, trading near 52-week lows and at ultra-che ...