ATHENS, Greece (AP) — After months out of the spotlight, Greece was back at the center of Europe’s financial troubles on Wednesday, when concerns over the stability of the government and its bailout program triggered a massive sell-off in stocks and bonds.

Greece’s main stock index closed 6.3 percent lower — having traded down as much as 9.8 percent lower earlier in the day. Following a 5.7 percent loss on Tuesday, that brings the index to its worst level in 14 months.