When the Federal Reserve signals higher interest rates or the US Dollar Index (DXY) climbs, foreign institutional investor (FII) capital reallocation shifts the open interest landscape of the Nifty 50 option chain.

The DXY and FII Outflow Transmission

A climbing Dollar Index pressures emerging market currencies like the Indian Rupee. To hedge cash equities without triggering market panic, institutional desks write Out-of-The-Money (OTM) Call options, constructing aggressive resistance barriers.

Identifying Call Walls (CPR ≥ 6.0x)

When Call-Put Ratio (CPR) multipliers on overhead strikes exceed 6.0x with low Put-Call Ratio (PCR < 0.75), institutional option sellers are capping index upside, dragging Max Pain lower.