How does RBA Interest Rate Decision affect Iron Condor wing width?

The RBA Interest Rate Decision primarily impacts SPX iron condors through its influence on global risk sentiment, USD strength, and subsequent VIX movement. A surprise RBA hike typically strengthens the AUD, pressures equities, and pushes VIX higher, requiring wider iron condor wings. A dovish or cut decision usually supports risk appetite, lowers implied volatility, and allows tighter wing widths.

Under the ALVH methodology, always tie wing width directly to prevailing VIX levels rather than the RBA event itself. Pre-RBA, if VIX is below 15, use 25-30 delta wings for 1.5-2.0% of underlying width. If VIX spikes above 18 post-decision, immediately widen to 15-20 delta wings (2.5-3.5% width) to maintain adequate POP and theta capture.

Practical rule: Measure the post-RBA VIX reaction within the first 30 minutes. If VIX rises more than 1.5 points, expand wings by 5-10 points on each side from your normal ALVH setup. This prevents premature stop-outs during the volatility expansion phase while preserving the iron condor’s neutral profile. Monitor the 10-year yield correlation as a secondary confirmation signal.