This paper considers a firm domiciled in an emerging market, modeling its decision to denominate its debt in a combination of its domestic currency and a foreign currency, that is, the dollar. The objective is to determine those situations when the firm is motivated to engage in currency mismatching, that is, denominating a higher percentage of its debt in dollars than what is warranted by its dollar‐denominated sales. The following factors are shown to induce greater currency mismatching: speculative capital flows into the emerging market, reduced ability to price discriminate between domestic and foreign customers, increased exchange rate stability, and lower risk‐aversion. Copyright © 2011 John Wiley & Sons, Ltd.