Stocks ended modestly lower on Wall Street, extending a losing streak to a fourth day.

Traders were worrying about the possibility that Britain would decide next week to leave the European Union.

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Credit card companies Tuesday fell after Synchrony Financial, the country’s largest issuer of store brand cards, said more of its customers were falling behind on their payments. Synchrony plunged 13 percent.

The Dow Jones industrial average fell 57 points, or 0.3 percent, to 17,674. The Standard & Poor’s 500 index lost 3 points, or 0.2 percent, to 2,075. The Nasdaq composite declined 4 points, or 0.1 percent, to 4,843.

Bond yields edged higher but are still the lowest they’ve been since 2012. The yield on the 10-year Treasury note edged up to 1.62 percent.