financial instruments and foreign currency debt. As we operate in multiple foreign currencies, including the euro, the Japanese yen, the U.K. pound, the Chinese renminbi, the Canadian dollar and approximately 100 other currencies, changes in those currencies relative to the U.S. dollar will impact our revenues and expenses. If the U.S. dollar weakens against a specific foreign currency, our revenues will increase, having a positive impact, and our overall expenses will increase, having a negative impact, on net income. Likewise, if the U.S. dollar strengthens against a specific foreign currency, our revenues will decrease, having a negative impact, and our overall expenses will decrease, having a positive impact on net income. Therefore, significant changes in foreign exchange rates can impact our results and our financial guidance.

Despite the challenging financial markets, Pfizer maintains a strong financial position. Due to our significant operating cash flows, financial assets, access to capital markets and available lines of credit and revolving credit agreements, we continue to believe that we have the ability to meet our liquidity needs for the foreseeable future. Our long-term debt is rated investment grade by both Standard & Poor’s (S&P) and Moody’s Investors Service. As market conditions change, we continue to monitor our liquidity position. We have taken and will continue to take a conservative approach to our financial investments. Both short-term and long-term investments consist primarily of high-quality, highly liquid, well-diversified, available-for-sale debt securities. For further discussion of our financial condition, see the “Analysis of Financial Condition, Liquidity and Capital Resources” section of this Financial Review.

Our Strategy

We believe that our medicines provide significant value for both healthcare providers and patients, not only from the improved treatment of diseases but also from a reduction in other healthcare costs, such as emergency room or hospitalization costs, as well as improvements in health, wellness and productivity. We continue to actively engage in dialogues about the value of our products and how we can best work with patients, physicians and payers to prevent and treat disease and improve outcomes. We will work within the current legal and pricing structures, as well as continue to review our pricing arrangements and contracting methods with payers, to maximize access to patients and minimize any adverse impact on our revenues.

On November 30, 2012, we completed the sale of our Nutrition business to Nestlé. On February 6, 2013, we completed the sale of approximately 19.8% of our ownership stake in Zoetis through an initial public offering. We may in the future make a tax-free distribution to our shareholders of all or a portion of our remaining equity interest in Zoetis, which may include one or more distributions effected as a dividend to all Pfizer shareholders, one or more distributions in exchange for Pfizer shares or other securities, or any combination thereof. We will consider all alternatives to maximize the after-tax return for our shareholders, including a tax-free