Stocks settled lower on Tuesday as concerns over the current U.S. government shutdown weighed heavy on outlooks. A decline in Oracle (ORCL  ) also added to profitability and high valuation woes regarding the booming artificial intelligence industry.

The S&P 500 Index (SPY  ) fell nearly 0.4% to close at 6,714.59, breaking a 7-day winning streak on Tuesday, while the tech-heavy Nasdaq Composite (QQQ  ) lost about 0.7% to end the day at 22,788.36. The Dow Jones Industrial Average (DIA  ) also declined over 90 points to finish at 46,602.98.

The broader market was pressured on Tuesday as Oracle lost 2.5% following a report from The Information stating that the software company is losing money on some of its deals with Nvidia (NVDA  ) and is in turn bringing in lower-than-expected profit margins for its cloud business. The report, citing internal corporate documents, said that of the roughly $900 million in revenue generated by Nvidia rental services during the three months ended in August, Oracle only made about $125 million in gross profits.

Despite the session's weakness, UBS strategists led by Ulrike Hoffmann-Burchardi believe the AI-fueled bull market still has plenty of room to run due to OpenAI's recent string of multi-billion-dollar deals with Advanced Micro Devices (AMD  ), Broadcom (AVGO  ), Nvidia and Oracle.

"With hundreds of billions in investment commitments and the bull market on track for its three-year anniversary, fears of an AI bubble that could rival the dotcom era are mounting. But there have been warnings of a bubble for almost as long as the AI boom has been in full swing," wrote Hoffmann-Burchardi, chief investment officer of Americas and Global Head of Equities at UBS, in a note. "In our view, a period of consolidation would not come as a surprise after such a strong recent run, but we believe the equity rally is underpinned by solid fundamentals that should continue to support the market."

The government shutdown in Washington D.C. also remained a key concern for market participants on Tuesday after what was expected to be a brief closure enters its second week.