The U.S. dollar and the Japanese yen have strengthened as investors seek safe-haven assets amid heightened market volatility. The yen has particularly rallied, while riskier currencies such as the Australian dollar and sterling have weakened. This shift in currency markets comes as investors brace for the upcoming U.S. payrolls report, which is expected to provide crucial insights into the state of the labor market. The market reaction follows the worst sell-off in recent times.