Wall Street’s largest banks are entering the second half of 2026 with a more cautious capital-markets backdrop after a strong first half. Third-quarter results showed that weaker dealmaking, rising bond yields, choppy technology markets and geopolitical uncertainty can quickly affect investment banking activity, even among the industry’s largest institutions.

Dealmaking Loses Momentum

The third quarter highlighted the cyclical nature of investment banking, with deal activity slowing after a stronger first half of the year. Mergers and acquisitions and initial public offerings had been expected to experience a long-awaited revival, but changing financial conditions have continued to make corporate transactions more difficult to execute.

Higher borrowing costs are particularly important for companies considering acquisitions or new capital-market transactions. As financing becomes more expensive, corporate boards can become more cautious about valuations, transaction structures and the timing of strategic decisions. That caution can translate directly into lower fees for investment banks.

Bond Yields Add Pressure to Corporate Decisions

Rising bond yields have emerged as another significant obstacle for capital-markets activity. Higher yields can increase the cost of financing and alter the economics of potential transactions, particularly when companies rely on debt markets to fund acquisitions or expansion.

The pressure also affects investors, whose changing expectations for interest rates can contribute to greater market volatility. The resulting uncertainty can make it harder for buyers and sellers to establish valuations and for companies to determine whether market conditions are favorable enough to proceed with planned offerings.

AI Volatility Complicates the Market Environment

The quarter also exposed the influence of a choppy AI trade on broader market sentiment. The rapid growth of artificial intelligence-related investment has supported significant activity across technology markets, but volatility in AI-linked assets has introduced another source of uncertainty for investors and corporate executives.

For Wall Street banks, this creates an uneven operating environment. Trading businesses can benefit from periods of increased market activity, while investment banking can suffer when uncertainty causes companies to delay strategic transactions. The differing effects reinforce the importance of diversified revenue streams among major financial institutions.

Recovery in M&A and IPOs Remains Delayed

Geopolitical concerns have added another layer of caution to an already complicated environment. Together with higher yields and market volatility, these factors have contributed to further delays in the expected recovery in M&A and IPO activity.

The outlook will depend on whether financing conditions stabilize and corporate confidence improves. Investors will be watching transaction announcements, IPO activity and investment-banking revenue for evidence that companies are moving from strategic discussions toward execution. If yields and market volatility remain elevated, the capital-markets slowdown could persist. Conversely, greater stability could allow delayed transactions to return to the pipeline, providing Wall Street banks with an important source of potential revenue growth in the quarters ahead.