Wall Street Journal: Markets: Heard on the Street

Twitter is proving that smaller may be better, even in social media, as purging users makes Twitter’s advertising business more healthy.

Shares in Samsung and SK Hynix have suffered despite both companies reporting record earnings.

PayPal results suggest eBay’s recent marketplace growth spurt may be short lived.

Shares in major casino operators in the world’s largest gambling market have been tumbling, but it isn’t time for investors to up their bets.

The merger of Ensco and Rowan makes sense, but the rally in their shares so far this year is premature because there is no sign of improving rates for their rigs this year or next, despite higher crude prices.

Many were surprised to see that Coca-Cola, the world’s largest beverage company, is considering dipping its toes into the cannabis market.

Despite the fabled co-founder’s retirement, Jack Ma will still have influence at Alibaba. But the real question for investors is whether his departure means the company’s best days are behind it.

Investors applauded and then cooled on trucking firm Knight-Swift following the merger that created it, but they should take another look.

Apple and Google’s app store commissions form a lucrative revenue stream that most app developers can’t sidestep in the way Netflix is attempting. That could spur regulators to take a closer look.

A promising rebound in loan growth now appears to be fading. That could become an issue, especially for small and midsize lenders.