How can US elections affect your portfolio?

Key takeaways

• US elections can affect a portfolio when they change expectations around taxation, government spending, trade and regulation, rather than simply because one party has won or lost.
• The same policy can affect different investments in different ways. A trade measure, for example, may support some domestic producers while increasing costs for companies that rely on imported materials.
• Bond markets can respond when political developments change expectations for economic growth, inflation, government borrowing or interest rates.
• Currency movements can increase or reduce returns on international investments when assets are held in a different currency from an investor’s base currency.
• Political party alone is not a reliable guide to portfolio performance. What matters more is how proposed policies connect with the assets an investor already holds and what markets have already priced in.

US elections often prompt a very practical question for investors: will the election impact your investments?

It can, but probably not in the simple way the political headlines suggest. An election does not automatically make stocks rise or fall, nor does a change of party produce the same effect across every portfolio. What matters is whether the political outcome changes expectations around taxation, trade, regulation, government spending and the wider economy.

Those changes can then travel through a portfolio in different ways. A company that relies heavily on imported materials may respond differently to a change in trade policy than a domestic producer. Expectations for government borrowing or inflation can matter to bonds. Currency movements can alter the return from overseas investments.

The useful question is not simply what the election result means for “the market”. It is which expectations are changing, which investments are exposed to them and how much of that change may already be reflected in prices.

How can elections affect your portfolio?

The connection between an election and a portfolio usually starts with expectations.

Markets do not have to wait for a new tax, tariff or spending programme to take effect before responding. If investors become more confident that a particular policy will be introduced, they may start reassessing company profits, economic growth, inflation or interest rates well before the policy is actually implemented.

But those effects are unlikely to be uniform. Higher government spending might support demand in some areas of the economy while also changing expectations for borrowing and inflation. A tariff might help a domestic producer competing with imports but increase costs for another company that uses imported components.

That means an election can matter even when there is no obvious market-wide “election effect”. Different parts of the same portfolio may respond in different directions at the same time.

There is also an important difference between what is proposed during an election campaign and what eventually becomes policy. Proposals can be amended, delayed or blocked, while their economic effects may turn out differently from what markets first expected.

For investors, the details often matter more than the political label attached to them.

Why policy can matter more than party labels

It can be tempting to divide investments neatly along party lines: one party is assumed to be good for a particular industry, while another is expected to favour something else.

In practice, markets have much more to consider. Political priorities can change over time, and similar policies can have different implications depending on the economic environment. A spending proposal introduced when inflation is already high, for example, may be interpreted differently from one introduced during a period of weak demand.

The ability to implement policy matters too. The presidency is only one part of the US political system, and major legislation can depend on which party controls Congress, the size of those majorities and the details of individual proposals.

Trade policy provides a useful example of why simple political labels can be misleading. A US International Trade Commission study examining tariffs introduced under Sections 232 and 301 found different effects across industries. Tariffs increased domestic sourcing in some protected industries, while higher input prices also reduced production in some downstream industries that relied on those materials.

So the relevant portfolio question is not simply whether a Republican or Democrat has won. It is which policies are likely to change, where the portfolio is exposed to those changes and what investors already expect to happen.

How election policy can move through a portfolio

Political developments can reach different investments through different channels. Stocks may respond to changes in expected profits, bonds to shifts in growth, inflation and interest-rate expectations, and international investments to currencies and trade.

Stocks and sectors

For companies, political policy matters when it changes expectations around revenues, costs or future profitability.

Changes in corporate taxation can affect after-tax earnings. New regulation can increase or reduce the cost of operating in a particular industry. Government spending priorities can influence demand for companies supplying goods and services to the public sector, while trade measures can affect businesses with international supply chains.

But even within the same sector, the effect may not be straightforward. Two companies exposed to the same policy can have different supply chains, pricing power, profit margins and geographic exposure.

That is why broad conclusions such as “good for stocks” or “bad for stocks” are often too simplistic. A policy may benefit some businesses while creating additional costs for others, without producing the same response across the equity market as a whole.

And political exposure is only one part of the investment case. Company earnings, valuations, interest rates and the broader economic environment continue to matter alongside election policy.

Bonds and interest rates

Elections can reach the bond market through a different route.

Proposals involving taxation and government spending can change expectations for economic growth, inflation and government borrowing. Those expectations may in turn influence bond yields and market interest rates.

For fixed-rate bonds, that matters because bond prices and market rates generally move in opposite directions. When market interest rates rise, existing bonds paying a lower fixed rate become relatively less attractive and their prices tend to fall. When market rates fall, existing fixed-rate bonds can become more attractive.

There is an important distinction here. The US president does not set Federal Reserve interest rates. The Federal Reserve sets monetary policy in pursuit of objectives established by Congress.

An election can change some of the fiscal and economic assumptions bond investors are considering, but it does not determine the path of monetary policy.

Currencies and international investments

The portfolio effects of a US election do not necessarily stop at the US border.

Changes in expectations around economic growth, trade, government finances and interest rates can affect demand for the US dollar. For investors holding assets in a currency different from their own, those exchange-rate movements can change the return they ultimately receive.

If an overseas investment rises in its local currency but that currency weakens against the investor’s base currency, some or all of the investment gain can be reduced after conversion. A strengthening foreign currency can have the opposite effect. Exchange-rate risk is therefore an important part of international investing.

Trade policy can also affect companies and markets outside the United States. Tariffs or changes in international economic relations can alter demand, costs and supply chains across borders, so a US election can have implications for portfolios with little direct exposure to US-listed companies.

Why political headlines do not always translate into portfolio returns

Election campaigns naturally produce clear headlines: a tax proposal, a new tariff, a spending pledge or a change in regulation. Turning one of those headlines into an investment outcome is much harder.

Markets are forward-looking. If a particular election result or policy change is widely expected, some of its anticipated effect may already be reflected in asset prices before voters go to the polls. A result can be politically significant without producing a dramatic market reaction if it largely confirms what investors had already anticipated.

The election result is also only one stage in the policy process. Campaign proposals can change, legislation can take time and the final policy may look different from the version investors originally considered.

Meanwhile, politics is competing with everything else moving markets. A company expected to benefit from a policy change can still disappoint on earnings. Bond yields can move because inflation data changes. Currency markets may respond more strongly to changing expectations for monetary policy than to an election announcement.

This is why understanding election risk is less about predicting one market reaction and more about understanding how political developments interact with exposures that already exist in a portfolio.

Can a US election impact your investments?

Yes, but there is no single portfolio effect that follows a US election.

Stocks can respond to changing expectations for taxation, trade, regulation and government spending. Bonds can react when the outlook for growth, inflation, government borrowing or interest rates changes. Currency movements can alter returns from international investments, while particular industries and companies may be more exposed to individual policy changes than others.

Those effects can also point in different directions at the same time. A policy that appears supportive for one part of a portfolio could create additional pressure elsewhere.

That is why political party alone provides limited information about what an election might mean for an investor. The more useful approach is to understand the connection between policy, market expectations and the assets already held in a portfolio.

US elections can change part of the environment in which investments operate. They rarely determine portfolio outcomes on their own.