Russia partially reopened its stock markets Thursday with heavy restrictions on trading, following a month-long shutdown that was put in place as Russia’s invasion of Ukraine and subsequent Western sanctions caused a massive selloff that cratered the market.

The Moscow Exchange resumed trading in 33 Russian stocks including major companies like Gazprom, Sberbank, Rosneft and VTB at 9:50 a.m. local time.

Investors are banned from short selling these equities and a halt on foreigners selling these stocks also remains in place.

Half hour after trading opened, the MOEX Russia Index was up more than 10% at around 2,720 rubles, after it had slumped a record 45% on the day Russia’s invasion began.