5 Things to Know Before the Stock Market Opens

Stock futures are slightly higher as major indexes look to rebound from a sluggish start to the month; a new economic forecast sees the global economy slowing next year because of tariffs; Costco is suing the Trump administration over those same tariffs as it looks for a refund; Bayer has received a vote of support from the U.S. Solicitor General in its efforts to stem lawsuits over whether Roundup weed killer causes cancer; and shares of software maker MongoDB are popping following a solid earnings report. Here’s what you need to know.

Stocks Tick Higher After Falling to Open December

Stock futures are pointing to modest gains this morning after major indexes had their five-session winning streaks snapped on Monday. Futures tied to the Dow Jones Industrial Average were up 0.1% recently, while those linked to the S&P 500 and the tech-heavy Nasdaq advanced 0.3% and 0.4%, respectively. Bitcoin was at $87,400, rebounding from a big slump yesterday that saw the digital currency move as low as $84,000. Gold futures were down 0.8% at $4,240 an ounce, while WTI crude oil futures slipped 0.3% to $59.15 per barrel. The yield on the 10-year Treasury note, which affects borrowing costs on a wide array of consumer loans, was at 4.12%, up from 4.10% at Monday’s close and below 4% late last week.

OECD Expects GDP Growth to Slow in 2026 as Tariffs Outweigh AI Boost

The Organisation for Economic Co-operation and Development said Tuesday the global economy has been more resilient to tariffs and other trade barriers than it had previously expected. However, the group noted that several risks remain. It cited “the prospect of further trade barriers, a potential sharp repricing of risk in financial markets, potentially amplified by stresses in leveraged non-bank financial institutions and volatile crypto-asset markets.” The OECD said that the economy is being propped up to a certain extent by spending on artificial intelligence development, and that it expects economic growth to slow next year as the true impact of the Trump administration’s tariffs are felt. The gross domestic product of the 20 largest economies is expected to grow 3.2% this year and 2.9% next year, while U.S. GDP is projected to grow 2% this year and slow to 1.7% growth in 2026.

Costco Suing Trump Administration Over Tariffs

Warehouse retail giant Costco Wholesale (COST) has joined the line of companies looking for a refund on tariffs. The company filed a lawsuit against U.S. Customs and Border Protection and the Trump administration on Monday, informing the Court of International Trade that it would seek a refund of the tariffs it has paid on imports in the last several months if the Supreme Court finds Trump’s tariffs unconstitutional. Costco did not specify in the filing how much it has paid in tariffs, but executives have said in previous earnings calls that the company was working with its suppliers to shift where it imported products from if possible to minimize the impact. The Supreme Court heard arguments last month on Trump’s tariffs, after lower courts have found that they are unconstitutional, and several justices appeared to be skeptical about Trump’s powers to impose the sweeping changes to U.S. trade policy. There is not currently a timeline for when the Supreme Court will decide its case, or when companies like Costco could potentially see a refund of any collected tariffs.

Bayer Stock Jumps on Solicitor General Support For Supreme Court Roundup Review

Shares of food and drug conglomerate Bayer are surging more than 10% on their home exchange in Germany after the U.S. Solicitor General supported its efforts to have the Supreme Court review prior rulings on whether Roundup weed killer, produced by Bayer-owned Monsanto, causes cancer. The Solicitor General said the Environmental Protection Agency has for years said that glyphosate, a chemical used in Roundup, is “not likely to be carcinogenic in humans,” and that the Food and Drug Administration has approved “hundreds” of warning labels for Roundup that did not include any information about cancer. Bayer said in a statement that it welcomes the support, and said a definitive ruling from the Supreme Court on whether companies can be sued for violating state laws when they are in compliance with a relevant federal law would provide clarity. The company said it “continues to advance its multi-pronged strategy designed to significantly contain the litigation by the end of 2026.”

MongoDB Stock Surges After Q3 Results Top Estimates

MongoDB (MDB) stock is soaring in premarket trading after its latest quarterly results handily topped estimates. After markets closed Monday, the database software maker said it earned an adjusted $1.32 per share on $628.3 million in revenue, each well above the analyst consensus compiled by Visible Alpha. The company also lifted its outlook for the rest of its fiscal year, as new CEO CJ Desai said that “existing customers are expanding with us and net-new customer additions continue to show strength.” Desai was appointed last month, when the company also said it expected third-quarter results to top its own prior outlook. MongoDB shares were up more than 20% ahead of the opening bell, on pace to hit their highest level since early last year.