Nvidia and TSMC are two leading tech stocks to own heading into 2026.As 2025 winds down, leading tech stocks once again helped lead the market higher by double-digit percentages. Continued strong momentum in the sector should continue through December and into 2026, making now a good time to look at two tech stocks to see if they are worth buying before the end of the year.NvidiaWhile Nvidia (NVDA 0.65%) is starting to face increased competition, it is still the king of artificial intelligence (AI) infrastr ...