The sharemarket closed marginally lower on Monday, but traded in a narrow range as investors cautiously awaited more details of US President Donald Trump’s next onslaught of trade tariffs.

The S&P/ASX 200 Index edged up 0.1, or by 5.7 points, to 7936.9 at the close. The All Ordinaries was down 0.8 points. Just three of the index’s 11 sectors were in the green.

The index seesawed between small gains and losses on Monday, with sentiment bearish as investors gear up for sweeping reciprocal and sector-specific tariffs on April 2. US officials on Friday hinted these tariffs would be targeted, but provided no further details. Uncertainty around the impact of Trump’s trade policies on growth and inflation has sparked volatility in financial markets and kept investors cautious.

“We can make assumptions on how hawkish the tariff headlines and public statements from Trump will be and the possible impact on consumption, inflation and business confidence - however, the reality won’t be truly realised in the data for a period,” Pepperstone head of research Chris Weston said.

Profit-taking took place across sectors. Stock transfer agency Computershare fell 2.5 per cent to $39.64 and toll road operator Transurban 2.7 per cent to $12.94. Supermarket Woolworths slid 1.7 per cent to $29.43, and Coles 2.1 per cent to $19.06.

Index bellwether James Hardie Industries was a significant detractor, plunging 14.5 perf cent to $40 after striking a $14 billion deal to merge with NYSE-listed AZEK. The latter’s shareholders will receive around 26 per cent of the combined company’s stock.