Start Trading is the theme of today’s puzzle. Trading. Like stocks. Because Wall Street. It’s the Wall Street Journal. I get it. GG, Mr. Bhat.

58A 9:30 a.m. event at the NYTSE, and a hint to the starts of the starred answers: OPENINGBELL.
18A *It may temporarily blind you: (bell)PEPPER SPRAY
23A *Be far superior to: (bell)TOWER OVER
36A *Friendly toast: (bell)BOTTOMS UP
51A *Precocious lad: (bell)BOY WONDER

This puzzle was just OK.

Finished in 19:33