Stock market live Thursday: S&P 500's first down day in 3, small caps' another record, Petco & Poshmark IPO pops

This is a markets live blog for CNBC PRO subscribers that will be updated throughout the day.

The S&P 500 registered its first daily losses in three amid the weakness in Big Tech on Thursday. Small-cap Russell 200 outperformed and jumped to a record as investors awaited president-elect Joe Biden's stimulus plan. For continuous real-time insight on the market see below.