Trump's Iran 'economic D-Day' is rattling US markets — and Canadian RRSPs

For Canadians, that may sound like someone else’s problem — it isn’t. A large share of RRSP money sits in U.S. stocks, in part because of a tax rule that makes this account the best place to hold them. When the S&P 500 dips, a chunk of many Canadians’ retirement savings drops with it — even for people who never chose to bet on American companies.

Here’s what’s happening, what it’s costing and what Canadians who are nearing or in retirement should do about it.

What is ‘economic D-Day’ and why is it hitting markets now

In that Truth Social post, Trump warned that Iran had failed to seize the opportunity for a deal and would face crippling economic pressure, adding that any country aiding Tehran would face “TREMENDOUS Economic Consequences.” Treasury Secretary Scott Bessent echoed the stance, signaling that new secondary sanctions could target foreign institutions that continue to trade with Iran.

The threat comes as shipping through the Strait of Hormuz (a transit point for roughly a fifth of global oil and gas supply) remains heavily disrupted. Brent crude topped US$93 a barrel last week, while U.S. crude climbed near US$86.70.

How much did this actually cost a typical RRSP

Consider this hypothetical scenario: a Canadian retiree with C$500,000 in an RRSP, with 40% invested in an S&P 500 index fund — a common setup in balanced and growth portfolios. A 0.87% single-day drop in that index erases roughly $1,740 from that portion of the portfolio in a single session, before factoring in any spillover into Canadian equities.

Fixed-income markets aren’t immune either. The 30-year U.S. Treasury yield pushed past 5.25%, near a two-decade high, as investors pulled back from long-dated U.S. government debt. Even an attempt by the U.S. Treasury to double its buyback of long-dated bonds to $4 billion failed to steady the market.

Why your RRSP has more U.S. exposure than you think

Under the Canada-U.S. tax treaty, American stock dividends paid directly into an RRSP are exempt from the 15% non-resident withholding tax that applies to TFSAs or non-registered accounts. Because of this tax treatment, financial advisors frequently recommend holding U.S. equity allocations inside an RRSP.

Years of record Canadian capital flows into foreign equities, combined with this tax treatment, mean most off-the-shelf target-date or ‘balanced growth’ funds carry significant U.S. exposure — placing them directly in the splash zone when Wall Street stumbles.

Could this squeeze your gas budget and mortgage rate?

Geopolitical tensions feeding energy markets create broader inflationary pressure. As Frederic Schneider, a nonresident senior fellow at the Middle East Council on Global Affairs, told Al Jazeera, sustained oil strength fans inflation, which in turn pressures the bond market and leaves central banks with limited room to ease monetary policy.

For Canadians, higher U.S. bond yields filter into domestic borrowing costs, mortgage pricing and fuel costs at the pump, making global supply shocks a direct household issue.

What Canadians should do with their RRSP right now

A short-term market reaction to geopolitical headlines isn’t a reason to abandon a long-term plan, but it is a good trigger to review your fundamentals:

• Audit your actual U.S. weighting: Check your fund statements or ETF fact sheets to confirm your true exposure.
• Plan your withdrawal sequence: If you are withdrawing from an RRIF, establish which liquid or defensive assets to sell first during volatile periods so you avoid locking in equity losses.
• Track bond allocations: Rising yields impact bond fund values; ensure your fixed-income strategy aligns with your immediate cash needs.
• Avoid panic selling: Selling during geopolitical uncertainty historically locks in short-term losses rather than protecting long-term capital.