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Meanwhile US president Donald Trump has turned his attention to India, tweeting yesterday the country had "long had a field day putting tariffs on American products. No longer acceptable!"
Market futures and mining stocks were mixed.
Metals and mining stocks in Toronto fell 1.7% yesterday.
However West African miner Avesoro Resources (TSX: ASO) has continued its recovery from a June low of C41.5c, when it slashed full-year guidance and its Youga mine in Burkina Faso was suspended for about a week over labour issues.
It gained 17.19% yesterday to close at $1.50 but is still a long way off last July's $5.99 peak.
Antofagasta and Glencore posted two of the bigger drops on the FTSE100 yesterday, closing down 3.83% and 2.88% respectively.
Western Australian lithium miner Pilbara Minerals was down 5.8% in afternoon Australian trade.
It had lifted yesterday on a new offtake agreement and saying it expected production and sales to "return to full capacity" in the December quarter, after flagging customer issues in June.
