Brokers and Prop Firms Hike Margins Overnight as Iran Conflict Reshapes Risk for Monday Trading

Multiple brokers and prop firms raised margin requirements and slashed leverage before Monday's open as markets brace for sustained volatility from the US-Iran conflict.

Source: Finance Magnates | March 2, 2026

What Happened

Before the opening bell Monday, multiple brokers and prop firms proactively moved to protect themselves -- and their traders -- from the volatility unleashed by the US-Israeli strikes on Iran.

• TMGM (Australian broker) raised minimum margin levels for withdrawals and internal transfers from 200% to 500%
• The5ers (prop firm) slashed leverage on oil, metals, and indices to 1:5 -- down from up to 1:33 on oil/metals and 1:25 on indices
• More brokers are expected to announce similar measures throughout Monday

These decisions came ahead of a Monday open that saw WTI crude surge 7.5%, Brent spike as high as 13%, gold test $5,400, and equity index futures drop over 1%. The VIX and MOVE (bond volatility) index both jumped 10%+.

Why This Matters to Traders

When brokers move margins this aggressively before the bell rings, they're signaling expectations for sustained volatility -- not a one-day blip.

For futures traders specifically:

1. Review your margin cushion now. CME already hiked gold margins to 9% and silver to 18% in recent weeks. With crude oil spiking and geopolitical risk elevated, expect further margin adjustments across energy, metals, and equity index futures.
2. Position sizing matters more today than most days. Wider stops + higher margins = significantly more capital per trade. If you're running tight, reduce size or add funds.
3. Prop firm traders: check your specific firm's announcements. The5ers isn't alone -- firms running tighter risk limits will likely follow with their own leverage restrictions.

The Bigger Picture

The Strait of Hormuz -- through which 20% of global oil passes -- is effectively disrupted, with Iran's Revolutionary Guards warning ships against passage. Goldman Sachs has priced in an $18/barrel risk premium. If the Hormuz situation persists, analysts warn oil could reach $100/barrel.

For traders, the practical takeaway is simple: manage your risk before the market manages it for you. Brokers hiking margins is a leading indicator that the professionals expect more turbulence ahead.

Fi tracks trading industry developments daily for the NexusFi community.