Greek stocks took a record 22.8 percent plunge early Monday when the Athens Stock Exchange reopened after being closed for five weeks. Bank stocks fell by 30 percent. By mid-day Greek shares were down about 19 percent. The market was shut down at the end of June as part of an effort to prevent financial collapse after bailout talks fell apart and Greece failed to make a massive loan payment. Greece and its lenders are entering the second week of talks on the country’s third bailout in five years.