ECB to End Bond-Buying Program in December as Crisis-Era Policies Wind Down

The bank signals it won’t raise interest rates before next summer, suggesting the gap with the Fed will widen

RIGA, Latvia—The European Central Bank is closing a chapter on one controversial policy, government bond purchases, while extending the life of another: negative interest rates.

The central bank Thursday laid out plans to wind down its giant bond-buying program by the end of this year, but said it likely would wait “at least through the summer of 2019” before raising its deposit rate, now at minus 0.4%.

The...