7 per cent in premarket trading
, while Pfizer's were down 2.
On the announcement of this news, the share price of Biogen stock plunged more than $59, or approximately 15%, during premarket trading
on July 24, 2015 -- from a prior day's closing price of $385.
S&P 500 index futures fell nearly two per cent in premarket trading
59 in premarket trading
Tuesday, well-below Charter's offer, suggesting concerns about regulatory hurdles.
5 per cent in premarket trading
, while its unit LinnCo's shares were up 6.
The major stock indexes were down in premarket trading
Comcast shares were up 1 pct in premarket trading
Penney lead a string of retailers posting results, and their shares all rose in premarket trading
Mortgage insurer MGIC InvestmentCorp posted its first quarterly profit in three years as fewer people defaulted on their home loans, sending its shares up as much as 16 percent in premarket trading
Shares of Microsoft and Google were lower in premarket trading
after the results of both fell short of expectations.
8 percent in premarket trading
after its board has approved a deal to buy blogging and social networking site Tumblr for $1.
Meanwhile, Apple shares fell in premarket trading
on Monday after The Wall Street Journal reported that the company has cut its orders for iPhone 5 components due to weaker than expected demand.