<h1>US tariff threat tied to India's Russian oil purchases triggers uncertainty, sending Sensex and Nifty lower on selling</h1> US President's remarks signalled a potential escalation of US tariff measures on Indian imports, reportedly linked to India's continued purchases of Russian oil; this renewed threat heightened trade-policy uncertainty and contributed to risk-off market positioning. The immediate operative effect reported was a decline in Indian equity benchmarks, with the Sensex and Nifty closing lower amid selling pressure in select blue-chip banking, energy, and IT stocks and more guarded investor sentiment.