US stocks edged lower on Tuesday as more Wall Street banks reported mixed earnings
  • US stocks opened lower on Friday to cap off a volatile week. 
  • The S&P 500 is on course for its worst week since December. 
  • OIl prices jumped as Russia cut production over sanctions. 

US stocks opened lower on Friday, with major indices set to cap off a volatile week with more losses. 

The S&P 500 was on course for its worst week since December, and investors are seeking cover after a string of disappointing earnings reports. Shares of ride sharing company Lyft sank more than 30% after an earnings miss. 

Elsewhere, Russia said it will cut oil production by 500,000 barrels a day, beginning in March, in response to a Western price cap effort.