Defence technology company DroneShield Ltd led the S&P/ASX 200's biggest gainers on Wednesday, surging 19.33% to close at A$4.26 as investors piled into counter-drone and resources names amid ongoing uncertainty from the US-Iran conflict and broader commodity movements.

The benchmark index recovered strongly, rising 1.85% to close at 8,534.3 points after earlier weakness tied to oil price volatility and global risk sentiment. While the broader market showed mixed performance, select stocks in defence, nuclear technology and critical minerals posted double-digit gains, reflecting themes of geopolitical hedging and supply chain security.