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The dollar climbed on Friday and was set to snap a two-week streak of declines as a worldwide cyber outage that affected banks, airlines and broadcasters unnerved investors, although volatility in the currency markets was largely contained.

A software update by global cybersecurity firm CrowdStrike
CRWD
crippled industries from travel to finance before services started coming back online after hours of disruption, highlighting the risks of a global shift towards digital, interconnected technologies.

The dollar index was on track for its second s