Largecap News Today — September 15, 2026
What to watch as Treasury Secretary Scott Bessent testifies before Congress and more — today's largecap signal.
US markets are navigating a complex landscape of politics, policy, and corporate performance. Treasury Secretary Janet Yellen's testimony before Congress today will likely draw attention to the government's fiscal priorities, particularly in light of new data on the costs associated with various military engagements, including the estimated $33.4 billion spent on operations in a recent conflict. Meanwhile, the Supreme Court's decision to reject a Trump administration bid to alter mail-in ballot rules may have implications for the upcoming election, and Senator Elizabeth Warren's planned criticism of the Clarity Act on the Senate floor could signal further debate on campaign finance regulations.
In the corporate world, the software sector is showing signs of resilience, with stocks like CrowdStrike and Palo Alto Networks contributing to a potentially record-breaking trend. However, not all tech subsectors are expected to fare equally well, as some investors are questioning the prospects for AI hardware stocks amid concerns about overvaluation and market volatility. As investors digest these developments, they will be watching for further cues on the intersection of politics, policy, and market performance.
Today's signal:
• What to watch as Treasury Secretary Scott Bessent testifies before Congress (cnbc.com)
• Weapon shortfalls, 'hundreds' of buildings and aircraft damaged, $33.4 billion spent: the U.S. government tallies costs of the Iran war (cnbc.com)
• Supreme Court rejects Trump bid to lift block on mail-in ballots rule (cnbc.com)
• Warren to rip Clarity Act on Senate floor ahead of key preliminary vote (cnbc.com)
• CrowdStrike and Palo Alto Networks are leading software stocks toward a never-before-seen feat (marketwatch.com)
• Is a 'SaaSpocalypse'-like sell-off coming for AI hardware stocks? Not so fast (cnbc.com)