Some of the stocks that may grab investor focus today are:

• Wall Street expects Fastenal Company (NASDAQ:FAST) to report quarterly earnings at $0.42 per share on revenue of $1.54 billion before the opening bell. Fastenal shares fell 2% to $51.20 in after-hours trading.
• Arch Capital Group (NASDAQ:ACGL) raised its buyback plan to $1.5 billion. The company also said it sees Q3 pre-tax net catastrophe losses of $330 million to $345 million. Arch Capital shares gained 1.1% to $40.59 in the after-hours trading session.
• Analysts are expecting AZZ Inc (NYSE:AZZ) to report quarterly earnings at $0.62 per share on revenue of $219.95 million for the latest quarter. The company will release earnings before the markets open. AZZ shares fell 0.5% to close at $54.67 on Monday.

Find out what's going on in today's market and bring any questions you have to Benzinga's PreMarket Prep.

Choosing the best broker is an important part of being a successful trader or investor

• Relay Therapeutics Inc (NASDAQ:RLAY) reported a $350 million common stock offering. Relay Therapeutics shares dipped 9.3% to $26.59 in the after-hours trading session.
• Analysts expect Smart Global Holdings Inc (NASDAQ:SGH) to post quarterly earnings at $1.60 per share on revenue of $461.30 million after the closing bell. Smart Global shares fell 0.1% to $43.46 in after-hours trading.