With U.S. retail sales declining 0.6% in November, fears of a recession are growing. If you haven't already prepared your portfolio for an economic downturn, this makes now the second-best time to prepare. 

And there's no better way to do that than by focusing on economic sectors that provide essential goods and/or services. Arguably no sector is more important to the economy than healthcare.

AstraZeneca (NASDAQ: AZN) and Bristol Myers Squibb (NYSE: BMY) are two pharmaceutical stocks that investors can buy with less than a $100 bill. Let's dig into the case for buying each stock.

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Source Fool.com