Supreme Court is set to hear arguments on U.S. tariffs. Here’s what to expect.

The Supreme Court is set to hear oral arguments on Wednesday concerning the legality of President Donald Trump's tariffs, which lower courts found exceeded his authority under the 1977 International Emergency Economic Powers Act (IEEPA). A ruling against the tariffs would strip the administration of a key negotiation tool, though Treasury Secretary Scott Bessent expects the court to uphold them and notes alternative tariff authorities are available. Market participants are expected to react to the proceedings, with analysts highlighting that judicial skepticism, particularly from Justices Roberts and Gorsuch, could signal an increased likelihood of the tariffs being struck down.

Analysis

The Supreme Court is scheduled to hear oral arguments on Wednesday regarding the legality of President Trump's tariffs, which lower courts previously ruled exceeded his authority under the 1977 International Emergency Economic Powers Act (IEEPA). This case challenges the president's use of emergency federal measures to impose elevated tariffs, with the court's 6-3 conservative majority's decision remaining uncertain despite past rulings favoring Trump.

A ruling against the tariffs would remove a significant negotiation tool for the administration, which has utilized IEEPA to address a $1.2 trillion U.S. goods trade deficit and fentanyl-related national emergencies. Treasury Secretary Scott Bessent anticipates the court will uphold the duties, noting that alternative tariff authorities, such as 15% tariffs for 150 days, are available if the IEEPA-based duties are struck down.

Markets are expected to react to the arguments, with Raymond James analysts, including Ed Mills and Ellen Ehrnrooth, cautioning that judicial skepticism alone does not guarantee the tariffs will be struck down. However, increased questioning from Justices John Roberts and Neil Gorsuch could signal a higher probability of the tariffs being invalidated, introducing potential market volatility. The general sentiment surrounding this event is neutral with an uncertain tone, indicating moderate market impact.

Key Decisions for Investors

• Investors should closely monitor the Supreme Court's oral arguments on Wednesday for judicial skepticism, particularly from Justices Roberts and Gorsuch, as this could signal increased tariff invalidation risk.
• Evaluate potential impacts on trade-sensitive sectors and companies, considering the administration's stated intent to utilize alternative tariff authorities if IEEPA-based duties are struck down.
• Be prepared for potential market volatility and adjust portfolio hedges or positions in response to the court's proceedings and any subsequent official statements regarding trade policy.