ABSTRACT The research question of which firm-level factors make firms more vulnerable to exchange rate fluctuations during periods of crisis has rarely been explored by prior literature. Using a large sample of 1577 firms from 9 developed and 11 emerging countries, this study presents a comprehensive analysis of how firm-level factors affect firms’ foreign exchange exposure before and during the COVID-19 crisis. The results provide evidence of a substantial increase in firms’ linear exposure during the COVID-19 period. The cross-sectional analysis reveals that the effects of firm-level variables on exposure are more pronounced during crisis periods and are different from non-crisis periods. Firms that have effective asset utilization or large operating profit margins remain less exposed during times of stress. Contrary to hedging theory, firms that have high incentives to hedge such as firms with high financial leverage become highly exposed to currency fluctuations during crisis periods. The interaction analysis provides further evidence that firms with high leverage can limit their foreign exchange exposure during periods of crisis if they have high asset turnover or high operating profits. The results offer important practical implications to firms for risk management during periods of crisis.