The deal in principal would provide for loans of 86 billion euros over three years in exchange for essentially an overhaul of Greece's economy. The accord still needs eurozone political approval.
The agreement with the country's creditors passed with support from the opposition. The vote allows Greece to begin negotiations with its creditors on a third bailout.
European interest rates are being pushed so low — to less than zero — that some banks are paying borrowers to take loans. Such low rates are aimed at boosting Europe's economy, but there are risks.
The European Central Bank chief said the bank will buy 60 billion euros' worth of bonds each month until either September 2016 or inflation reaches about 2 percent.