According to Ed Clissold, chief U.S. strategist at Ned Davis Research, the Russell’s inability to surpass its November 2021 high represents “the longest streak on record while the S&P 500 was hitting ...

How is the heat index calculated, and why is it more important than the air temperature during some heat waves?

The heat index, or apparent temperature, combines air temperature and humidity to indicate how hot it feels to the body. High humidity slows sweating, the body's natural cooling system, making ...