Seaspan Corporation's (NYSE: SSW) stock is down a nauseating 47% this year and 66% over the past three. Driving the decline is a significant drop in the company's earnings due to challenges in the shipping industry, including the bankruptcy of one of its customers. That said, despite recently reporting another rough quarter, the tide in Seaspan's financial results appears to be turning.That possibility of an improvement in its results, when combined with the company's dirt cheap valuation and compelling dividend yield, give investors several good reasons to buy Seaspan's stock.