Insmed's shares rose after the biotech reported that a candidate drug to treat bronchiectasis, a chronic lung condition, met its primary endpoint in a Phase II trial.

Roku was hit with a pair of downgrades on Wednesday

Stocks finish lower as North Korea threat returns.

Stocks are lower as North Korea threat returns. Here's where stocks are trading by the afternoon session.

Stocks are lower as North Korea threat returns. Here's where stocks are trading at the market open.

Stock futures are lower as North Korea threat returns. Here's where stocks are trading ahead of the market open.

The healthcare sector was dragged down by reports of price collusion and worse-than-expected third-quarter profits.

On 17 occasions, RA Capital bought shares in biotech company financings after having sold short shares of the same company when it was supposed to be restricted from doing so.

A month after Fed Chair Janet Yellen's comments, ETFs covering both groups are pushing towards new highs on strong fundamental backdrops.

Roku's eroding market share, and its need for new investment, will pressure near-term profits, according to KeyBanc analyst Justin Patterson.

“Our investor survey reinforces our views that Elon Musk's recent involvement with Twitter has contributed to negative sentiment momentum in Tesla shares," said Morgan Stanley analyst Adam Jonas.

Mobile carrier companies are always eager to increase revenue through fees customers pay and to outflank their competition with deals.