The ProShares UltraPro QQQ ETF (TQQQ) closed down 4.07% at $84.66 on December 27th, as tech stocks led a broader market decline. The Nasdaq-100 Index, which TQQQ tracks, fell 1.36% to 21,473.02, driven by a pullback in major tech stocks. The "Magnificent Seven" tech giants, including Tesla, Nvidia, and Microsoft, saw significant declines, with Tesla dropping 5% and Nvidia nearly 3%. This retreat comes amid a lack of earnings and economic news, with trading volumes lighter than usual due to the holiday period, exacerbating market volatility. Rising Treasury yields, with the 10-year yield reaching 4.63%, also contributed to the pressure on equities, as investors reassessed their positions in tech stocks that have been market leaders throughout the year.