Stock Market Today: The Nasdaq composite dropped Thursday as Sandisk and SK Hynix plunged. TSMC sold off on earnings.

Wall Street still prices Abbott like a slow-and-steady dividend stalwart, but a pair of massive strategic moves beneath the surface suggests that framing may be costing investors a significant opportunity.

DexCom's G7 15 Day wins Health Canada authorization, offering longer wear, high accuracy and smart features for adults with diabetes.

Mid-cap stocks have the best odds of scaling into $100 billion corporations thanks to their tested business models and large addressable markets. But the many opportunities in front of them attract significant competition, spanning from industry behemoths with seemingly infinite resources to small, nimble players with chips on their shoulders.