These top stocks are looking increasingly attractive for a long-term investment.Not all stocks have responded to the bull market in the some way. While many businesses have followed the broader trend of steadily rising, some stocks are trading down considerably and even coming close to historical lows.When you're looking at stocks to buy, whether shares are discounted or soaring, it's important to understand why those trends are happening and what it means for your portfolio. On that note, if you're hunting ...