The iShares MSCI Japan index ETF fell 0.6% in midday trading, after Japan was hit by a second earthquake with a magnitude of 7.4, prompting another tsunami warning.
Nikkei futures dropped around 1.1% after news of the earthquake, while the Dow Jones lost 0.4% and the Nasdaq fell 0.2%, Reuters reports.
The previous earthquake hit the country on 11 March, causing a tsunami and affecting certain nuclear reactors.
The iShares MSCI Japan index ETF saw significant trade volumes in the following week, peaking at almost 400m shares traded, compared with the previous daily average of around 24m shares.
Lipper says the ETF attracted inflows of $860m in the week up to 16 March.
Cash flows into Japan equity funds were also dominated by ETFs in that week, with eight of the tracker funds garnering $936.8m.
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