U.S. stock futures were higher this morning, with the Nasdaq 100 futures gaining more than 1% on Monday.

Shares of Biohaven Ltd (NASDAQ:BHVN) fell sharply in pre-market trading.

Biohaven announced enrollment of first patient in its pivotal Phase 3 trial of BHV-1300 for Graves' disease.

B of A Securities analyst Jason Gerberry downgraded Biohaven from Neutral to Underperform and lowered the price target from $12 to $11.

Biohaven shares tumbled 5.2% to $15.00 in pre-market trading.