Stock market live Friday: Dow gains 260, posts down week, Boeing falls 6%
8:00 am: Tyson downgraded on worries about planet closures
Shares of Tyson Foods fell more than 1% in premarket trading on Friday following a downgrade to market-perform from outperform from AB Bernstein. The Wall Street firm said it has near-term uncertainty around Tyson’s ability to maintain production levels with closed production plants and absent workers. “There could be further downside…