With the 2026 U.S. midterm elections getting closer, political developments are moving back into investors’ field of view. Morgan Stanley Wealth Management is not telling clients to focus on predicting who will control Congress. Instead, it has laid out a four-part Midterm Signal Monitor to track whether the political backdrop is shifting.
The framework follows four indicators: the generic congressional ballot, presidential approval, consumer confidence, and gasoline prices. Morgan Stanley said those measures map to party support, satisfaction with the administration, how households feel about the economy, and the most immediate form of cost-of-living pressure. The firm added that the indicators are better used as directional signals for the election environment, not as a direct forecast of final congressional control.
At a broader level, all four indicators point to the same question: how U.S. voters feel about the economy. Even though inflation has come down from its peak, the price level for food, housing, healthcare, and energy remains well above where it stood a few years ago, making living costs a central issue in this election cycle. A Reuters/Ipsos survey also showed that cost of living remains a major concern for voters.
For investors, the issue is not any single poll reading on its own. The real question is whether these signals are strong enough to change the expected balance of power in Congress and then feed through to regulation, taxes, and industry policy. Morgan Stanley pointed in particular to technology and energy as sectors with greater policy sensitivity, while also saying that the business cycle, corporate fundamentals, interest rates, and the AI investment cycle may still outweigh the election in market terms.
The generic congressional ballot points to possible changes in the power structure
The first signal is the generic congressional ballot, a national survey that does not ask voters about a specific candidate but instead which party they would support if the congressional election were held today.
That makes it different from district-level polling. Morgan Stanley treats it more as a gauge of the national political mood than as a tool for projecting individual seats.
According to the firm’s data, the Democratic lead in the generic congressional ballot widened from 6.1 percentage points in August to 8.1 percentage points in September.
For investors, the significance is not the spread itself. What matters is whether the move suggests a changing probability of a shift in congressional control. Markets do not directly price which party is ahead in a poll. They price what election outcomes could mean for the ability to pass fiscal, tax, and regulatory measures.
If the president’s party controls both the White House and Congress, major fiscal, tax, and regulatory agendas usually have more room to advance. If government is divided, large policy changes often face a higher bar in Congress. That is why the generic ballot matters to markets: it offers a clue about future policy room.
Presidential approval shows the pressure facing the party in power
The second signal is presidential approval.
Midterm elections are not only contests between local candidates. Voters’ views of the sitting administration also shape the political environment. Morgan Stanley said presidential approval can help investors judge the pressure facing the governing party.
At the time of publication, the firm’s tracked presidential approval reading was about 40%, up slightly from 39.5% earlier, but still in a range that has historically implied meaningful midterm pressure for the party in power.
Morgan Stanley cautioned against reading that number mechanically. A low approval rating does not automatically translate into a fixed number of lost seats for one party. The more useful approach is to read it alongside the generic ballot and consumer sentiment to see whether several indicators are moving in the same direction.
If multiple signals deteriorate at once, market expectations for the future shape of Congress and the policy path may adjust more sharply.
Consumer confidence captures how voters feel, not just what macro data say
The third signal is more directly tied to the economy: consumer confidence.
Morgan Stanley cited data showing consumer confidence fell from 51.7 in August to a preliminary 47.8 in September, clearly below the historical average level it tracks for election years.
The importance of this measure is that it helps explain a gap that often appears in election cycles: macroeconomic data and voter experience do not always line up. Inflation in the United States may have fallen meaningfully from its high, but that does not mean the price increases of the past few years have been reversed.
Lower inflation means prices are rising more slowly. It does not mean prices have gone back down. After several years of cumulative increases in healthcare, food, housing, and energy, households are still dealing with higher day-to-day expenses. Morgan Stanley said that makes affordability, rather than inflation alone, one of the core economic themes of this midterm cycle.
That is why consumer confidence deserves separate attention. It does not measure GDP or corporate profits. It measures how voters themselves feel about the economy. For markets, if growth remains stable while consumer sentiment keeps weakening, the gap between economic fundamentals and political feedback may widen.
Gasoline prices are the most visible wallet indicator
The fourth signal may be the most intuitive one: gasoline prices.
Unlike many macro indicators, energy prices do not require consumers to read a CPI report. People feel them every time they fill up. Morgan Stanley therefore included gasoline prices as a standalone part of its midterm monitor. Its data showed that, as of publication, the year-over-year increase in regular gasoline prices had widened further.
The effect of fuel prices does not stop at the pump. Higher diesel and transport costs can also feed into logistics, food, and other everyday goods. In that sense, energy prices are both an independent cost-of-living measure and a factor that can reinforce how consumers perceive overall inflation.
That means gasoline prices in the final weeks before voting may enter voter perception more directly than some lower-frequency macro data. Even so, Morgan Stanley said energy prices are only one of many factors that influence voting behavior and should not be used on their own to infer the election result.
For investors, the real issue is policy risk after the election
Taken together, the four indicators form a fairly clear chain of observation: the generic ballot shows party support, presidential approval shows governing pressure, consumer confidence shows economic sentiment, and gasoline prices show the most immediate cost-of-living strain.
But the chain matters only if it reaches markets. For investors, the most important effect of the midterms is not the vote itself. It is whether a change in congressional control forces a repricing of policy expectations.
Morgan Stanley highlighted two sectors in particular.
One is technology. If the balance of power in Congress changes, some technology companies could face more scrutiny on competition, data privacy, and artificial intelligence. Even if no major new law is passed, more congressional hearings and regulatory debate could raise policy uncertainty.
The other is energy. With energy prices already part of the cost-of-living debate, energy companies could face more political attention tied to prices, taxes, and fossil fuel policy.
The key word, Morgan Stanley said, is still possibility. A change in congressional control does not mean new policy will automatically pass, and more regulatory discussion does not mean corporate earnings will change right away. What investors need to watch is whether political change moves from campaign rhetoric into the legislative and regulatory process.
Morgan Stanley’s final warning: do not overtrade the midterms
The firm’s closing message was that investors should not let the midterms overshadow the variables that more often drive U.S. equities.
Historically, divided government has not automatically meant weaker stock-market performance. Morgan Stanley said its historical data show that, in samples under Republican presidents, the S&P 500 posted a relatively high historical average return in the year after midterm elections when Congress was split between the two parties. One explanation offered by the firm is that political gridlock may reduce the odds of sudden major policy changes.
Still, historical average performance cannot be used to predict market returns after this election.
As the midterms approach, Morgan Stanley said investors can focus on four signals: the generic congressional ballot, presidential approval, consumer confidence, and gasoline prices. The first two help gauge whether the political structure is shifting. The latter two help show whether cost-of-living pressure is still shaping voter sentiment.
The next step is what matters most: whether those signals ultimately translate into a change in congressional control, and whether a new congressional structure can then alter taxes, regulation, and industry policy.
Until that becomes clearer, Morgan Stanley said the midterm election is better treated as a policy-risk variable than as a standalone market-direction indicator. The firm added that the business cycle, corporate fundamentals, inflation, interest rates, and the AI investment cycle may still be more important drivers of market performance.