The Budapest Stock Exchange's main BUX index finished the session Thursday down 2.04% at 17,105.39, falling on worries about the eurozone debt crisis in the run-up to an EU summit at the weekend.
OTP Bank fell 4.44% to HUF 3,335 on turnover of HUF 5.7bn or nearly three-fourths of the HUF 7.8bn session total.
Oil and gas company MOL dipped 1.59% to HUF 16,730 on turnover of HUF 1.0bn.
Drugmaker Richter lost 1.68% to HUF 35,100 on turnover of HUF 294m.
Magyar Telekom was the only blue chip to advance, gaining 0.39% to HUF 509 on turnover of HUF 340m.
The bourse's mid-cap BUMIX index fell 0.44% to 1,384.52.
Elsewhere in the region, Warsaw's WIG 20 was down 2.41% and the Prague PX dipped 1.14%.
Western Europe's biggest indices were all lower late Thursday. London's FTSE 100 was down 0.88%, Frankfurt's DAX fell 2.27% and the CAC 40 in Paris slipped 1.95%.