Economy April 21, 2026 05:06 PM

Markets Jitter Ahead of U.S.-Iran Ceasefire Deadline as Oil and Dollar Gain

Investors weigh unclear peace signals from Washington and Tehran; Fed nominee hearing, airline remarks and Apple succession add to volatility

By Hana Yamamoto
Markets Jitter Ahead of U.S.-Iran Ceasefire Deadline as Oil and Dollar Gain

Oil and the U.S. dollar strengthened on Tuesday while U.S. equities retreated as markets reacted to ambiguous signals from both Washington and Tehran over whether talks are proceeding. The move came one day before the U.S.-Iran ceasefire deadline, which President Donald Trump extended after markets had closed. Other market drivers included a contentious confirmation hearing for Fed nominee Kevin Warsh, remarks by the president on airline consolidation, and leadership changes at Apple that stoked investor uncertainty.

Key Points

  • Geopolitical uncertainty - unclear signals from Washington and Tehran ahead of the U.S.-Iran ceasefire deadline - is lifting safe-haven assets and pressuring equity markets, notably U.S. indices and airline stocks.
  • Macroeconomic and policy developments are in focus: a contentious Fed nominee hearing raised prospects of changes to monetary policy framework and communication, while central bank speeches and inflation data across major economies could move bond yields and currencies.
  • Corporate-specific events amplified volatility: Apple announced an executive succession plan that sent shares lower, and presidential comments on airline mergers and bankrupt Spirit Airlines influenced sector performance; energy remained the only S&P 500 sector to gain on the day.

Oil and the dollar rose on Tuesday while U.S. stocks slipped, a response by investors to mixed and inconclusive signals from Washington and Tehran about the status of peace talks. The market response unfolded a day before the set U.S.-Iran ceasefire deadline, a deadline President Donald Trump extended after markets had closed.

In a separate analysis published today, I examine why China's exchange rate may not be as chronically undervalued as many market observers assert. While China runs substantial external surpluses that contribute to widening global imbalances, much of that effect is offset by very large capital outflows on the financial account, according to the piece.

Readers are also invited to an upcoming LSEG webinar on April 23, where I will discuss safe-haven dynamics in uncertain markets alongside my ROI colleague Mike Dolan.


Recommended reading to contextualize today's moves:

  • 1. Iran yet to decide on whether to attend talks as ceasefire deadline ticks down
  • 2. Warsh says he made no rate-cut promises to Trump, plans 'robust' Fed reforms
  • 3. Record surge in gasoline receipts boosts U.S. retail sales, but weakness is looming
  • 4. Can Europe take advantage of its savings buffer over U.S.?: Mike Dolan
  • 5. EXCLUSIVE-Meta to start capturing employee mouse movements, keystrokes for AI training data

Key market moves on the day

  • Stocks: Asian equities were generally higher. The KOSPI staged a dramatic run - hitting a new high and rising about 26% in April, putting it on track for its best month since 1998. European markets were down roughly 1%. Wall Street's major indexes fell about 0.6%.
  • Sectors and shares: All but one S&P 500 sector finished lower, with energy the lone gainer. Six sectors fell by 1% or more while energy rose 1.3%. Airlines underperformed, down 1.7% overall; American Airlines fell another 4% for a second straight day and United lost 3% in after-hours trade. Apple dropped 2.5%.
  • Foreign exchange: The dollar strengthened. The euro was the weakest among G10 currencies, while the Chilean peso (CLP), South African rand (ZAR) and Hungarian forint (HUF) ranked among the largest decliners in emerging markets.
  • Bonds: Japanese government bond yields eased while European yields climbed. U.S. yields rose by about 9 basis points at the short end, producing the largest curve flattening in two weeks.
  • Commodities and metals: Oil gained about 3% while gold declined around 2%.

Major themes and talking points

Duel on the Hill: Kevin Warsh's confirmation hearing for Fed chair was contentious. He placed blame on the central bank for the post-pandemic inflation surge and fielded probing questions from senators about the extent of former President Trump's influence over monetary policy. Warsh declined to explicitly state that Trump lost the 2020 election. He urged what he termed "regime change" at the Federal Reserve - proposing a new "framework" for inflation control and a potential overhaul in how the Fed communicates with the public - though he emphasized that monetary policy independence remains "essential." If confirmed, Warsh indicated there could be significant changes to the Fed's approach.

Trump's intervention in corporate matters: The president again signalled strong opinions about private companies and deals. On Tuesday he voiced opposition to a potential merger between United and American Airlines and said he would "love somebody to buy" Spirit Airlines, which is in bankruptcy. His public comments have in recent months produced pronounced share-price reactions across affected companies.

Apple succession and AI questions: Late Monday the company announced that Tim Cook will step down in September to become executive chairman, with John Ternus set to take over as CEO. Apple shares fell 2.5% on Tuesday, marking the largest one-day drop in two months - the last comparable decline occurring just before the outbreak of the Iran war. Market attention has shifted to how Ternus will approach artificial intelligence. Analysts highlighted that Apple's press release did not mention AI, prompting questions about whether the company will embed AI capabilities incrementally across existing products rather than pursue a single, transformative AI product - a strategy that carries execution risk in a market where visible innovation is a major competitive factor.


Near-term market catalysts to watch

  • Developments in the Middle East and any updates on the U.S.-Iran ceasefire talks
  • Energy market price moves
  • Japan trade data for March
  • South Korea producer price inflation for March
  • Interest-rate decisions in Indonesia and Turkey
  • UK PPI and CPI inflation data for March
  • Euro zone consumer confidence for April
  • Speeches from European Central Bank officials, including President Christine Lagarde and board members Philip Lane, Piero Cipollone, Sharon Donnery, and Frank Elderson
  • U.S. Treasury auctioning $13 billion of 20-year bonds
  • U.S. corporate earnings due from Tesla, Lam Research, GE Vernova, IBM, AT&T, Texas Instruments and Boeing

Note on staying informed

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Risks

  • Uncertainty around the U.S.-Iran ceasefire talks - unclear participation and outcomes could prompt further moves in oil, safe-haven currencies and equity risk sentiment, affecting energy, travel and financial sectors.
  • Potential policy shifts at the Federal Reserve if Kevin Warsh is confirmed - proposed changes to inflation-control frameworks and communications could influence fixed-income markets and the broader economic outlook, thereby impacting banking, consumer discretionary and interest-rate sensitive sectors.
  • Corporate governance and strategic risk at large cap tech - leadership change at Apple and lack of explicit AI positioning in its succession announcement may increase execution and innovation risk, with implications for technology sector performance and related supply chains.

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