Investors’ summer optimism gives way to insecurity as curfews and lockdowns return

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Stock markets in the US and Europe fell sharply oas investors focused on signs that rich countries’ efforts to contain the coronavirus pandemic were foundering.

In Europe, the Stoxx 600 index lost 1.8% after heavy falls in German blue-chip stocks. In the US the Dow Jones industrial average closed 2.3% down at 27685.38, while the benchmark S&P 500 fell 1.9% to 3400.97.