US stock futures tumble as officials offer no respite from tariffs

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US stock-index futures dropped sharply on Sunday after the Trump administration indicated that sweeping tariffs would be kept in place despite fears they could induce a global economic recession.

Contracts tracking the blue-chip S&P 500 fell 3.8 per cent and those for the tech-heavy Nasdaq 100 slid 4.6 per cent. Trading activity is typically light early in the Asian morning,…