This under-the-radar company is, arguably, the safest double-digit-yielding stock on Wall Street.Over the last century, no asset class has generated a higher average annual return than stocks. With thousands of publicly traded companies and exchange-traded funds (ETFs) to choose from, there's a very good chance one or more securities can help you meet your financial goal(s).But among the countless investing strategies on Wall Street, buying and holding high-quality dividend stocks yields an above-average ra ...