Stock market averages (^DJI, ^IXIC, ^GSPC) are clocking in in positive territory at the market open, the Nasdaq Composite blasting off by over 300 points as markets await the Federal Reserve's interest rate decision Wednesday afternoon.

Brad Smith and Jared Blikre examine market movements at the beginning of Tuesday's session, eyeing trends int the tech-heavy Nasdaq 100 (^NDX) and the Russell 2000 (^RUT) small-cap index as more investors rotate out of Big Tech.

For more expert insight and the latest market action, click here to watch this full episode of Morning Brief.

This post was written by Luke Carberry Mogan.