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U.S. stock futures are sinking on investor jitters over artificial intelligence (AI) competition from China; Nvidia (NVDA) and ASML Holdings (ASML) are among tech shares sinking in premarket trading on worries about China's DeepSeek AI model; AT&T (T) stock is moving higher after reporting fourth-quarter profit rose by 70% year-over-year; Colombia agreed to accept migrants deported from the U.S. after President Donald Trump threatened the country with tariffs; and Venture Global (VG) stock is furthering its decline after its stock market debut Friday. Here's what investors need to know today.

1. US Stock Futures Sink on Tech Downturn

U.S. stock futures are pointing sharply lower as tech shares retreat on worries over China's artificial intelligence (AI) capabilities. Following consecutive winning weeks for the major stock indexes, Nasdaq futures are about 4% lower, while those associated with the S&P 500 and Dow Jones Industrial Average are lower by roughly 2% and 1%, respectively. Bitcoin (BTCUSD) also is retreating from recent highs, falling nearly 4% to trade at under $99,000. Yields on the 10-year Treasury note and oil and gold futures also are lower.

2. Nvidia, TSMC Lead Other Tech Stocks Lower on DeepSeek Worries

Nvidia (NVDA) shares are plummeting roughly 12% in premarket trading after Chinese company DeepSeek unveiled an AI model that uses cheaper, less-advanced chips. Other sector stocks declined, with U.S.-listed shares of Taiwan Semiconductor Manufacturing Co. (TSM) dropping 11%. Other companies with AI-related offerings also moved lower, with Microsoft (MSFT) falling 5%, and Meta Platforms (META) and Tesla (TSLA) dropping roughly 3% and 4%, respectively. The three "Magnificent Seven" companies will report earnings later this week.

3. AT&T Stock Rises as Q4 Profit Surges 70%

AT&T (T) shares are rising 2% in premarket trading after the telecom giant reported fourth-quarter profit that jumped 70% year-over-year to $4.41 billion, or 56 cents per share, on revenue of $32.3 billion. Analysts polled by Visible Alpha expected profit of $3.38 billion, or 46 cents per share, on roughly flat revenue of $32.07 billion. Shares of AT&T, which affirmed its 2025 guidance, had gained more than 30% over the last 12 months through Friday's close.

4. Colombia Accepts Deported Migrants After Trump Tariff Threat

President Donald Trump backed off a threat of "emergency" tariffs on imports from Colombia after the South American country agreed to let two repatriation flights from the U.S. land there. White House Press Secretary Karoline Leavitt said in a statement on X Sunday night that the actions on tariffs and sanctions would "be held in reserve, and not signed, unless Colombia fails to honor this agreement." Earlier, Trump wrote on his Truth Social platform that he would place "emergency 25% tariffs on all goods coming into the United States" from Colombia, adding they would be lifted to 50% in one week.