It's the first full trading hour of September and it's not even fall yet, but stocks are turning red in Tuesday's session Catalysts hosts Madison Mills and Brad Smith tackle the biggest market stories (^DJI, ^IXIC, ^GSPC) in this hour while interviewing top Wall Street experts.

Elliott Management has secured a 10% stake in Southwest Airlines (LUV) through its common stock, allowing it to hold special meetings with the airline operator. Boyd Group International President Mike Boyd joins the program to talk about the board of director changes the activist investor may call for.

Catalysts also welcomes on Bernstein Research senior analyst Stacy Rasgon to discuss sales trends in the semiconductor industry and the stock boost Nvidia (NVDA) expects from the delayed shipments of its Blackwell chips.

Other top trending stocks on the Yahoo Finance platform include Chinese EV makers Nio (NIO) and Li Auto (LI), Super Micro Computer (SMCI), Airbnb (ABNB), and Apple (AAPL).

This post was written by Luke Carberry Mogan.