A note from Morgan Stanley adds to a theme investors have been watching throughout earnings season: the market’s direction is increasingly being set by corporate profit momentum rather than day-to-day swings in macro headlines.

The firm’s equity strategist Mike Wilson said the most important driver of U.S. equities right now isn’t oil prices or interest rates—it’s earnings. In the bank’s framing, earnings strength is repeatedly beating expectations, helping keep the rally intact even as investors monitor geopolitics and policy uncertainty.

That perspective matters because the market has recently had to digest several potential “macro shocks” at once: commodity volatility, shifting rate expectations, and geopolitical developments. When equities continue to climb through that noise, it often implies that profit growth and forward guidance are doing the heavy lifting.

Morgan Stanley pointed to a better-than-usual earnings surprise profile this quarter, suggesting that analysts may have been too conservative on profit forecasts. When earnings estimates rise faster than index prices, valuation multiples can actually compress even as stocks advance—an outcome that can make rallies look less fragile than the headlines suggest.

For investors, the implication is straightforward: if earnings revisions remain positive and the breadth of earnings strength expands beyond a handful of megacaps, the market can stay resilient. Conversely, if earnings momentum fades, macro risks could reassert themselves quickly.

The next checkpoints are likely to be:

• The pace of forward earnings revisions for the S&P 500.

• Guidance trends—especially among cyclical sectors that are sensitive to growth.

• Whether the market’s leadership broadens, which can be a sign that earnings strength is “real” rather than concentrated.

In short, Morgan Stanley’s message is that the current rally has a fundamental underpinning: earnings. For traders and long-term investors alike, that shifts attention back to company results and guidance as the primary scoreboard for U.S. stocks.