David Fickling, Columnist

The Party's Over

More than inversions and share buybacks will be needed to avoid a crashing hangover in global stocks.
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It's when a party's been going on too long that it's most at risk of getting out of hand. The more interesting guests fade away, leaving the field dominated by a sketchier crowd. Behavior considered beyond the pale earlier in the evening is excused to inject more vigor into flagging spirits.

Financial markets, which former Federal Reserve Chairman William McChesney Martin once likened to a drunken debauch, exhibit similar dynamics. Seven years into the current global economic recovery, the punch bowl is almost drained. The remaining revelers are starting to raid the cupboards for stronger stuff.