If you've ever wondered what the circle arrow button on your key fob is for but were too embarrassed to ask your mechanic or dealership, here's the simple truth: it remotely starts your car.

Shares of Circle Internet Group ( CRCL -7.80%) are falling on Tuesday, down 8.3% as of 3:11 p.m. ET. The drop comes as the S&P 500 gained 0.1% and the Nasdaq Composite lost 0.3%. Circle, the company ...

Press the circle arrow button on your fob from your kitchen as you're pouring that last cup of coffee and by the time you're ready to leave, your vehicle's interior temperature will be just the ...