Jim Simons, a legendary mathematician who founded quantitative hedge fund Renaissance Technologies, passed away on Friday.

Consumers are acting vastly different depending on income level.

European companies are finding it harder to make money in China as growth slows and overcapacity pressures increase, according to an annual business survey.

"Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

CNBC's Jim Cramer on Thursday reviewed two major players in the energy drink sector that have seen declines recently: Celsius and Monster.

CNBC's Jim Cramer reviewed Nvidia, Apple, Amazon and Tesla through a long-term lens, saying they have "riveting stories and temperamental stocks."