BUZZ-Atlantic Power Corp: Stock on track for worst day in 18 months
** Power producer's U.S.-listed shares down 18 pct at $3.12 premarket, on track for steepest fall since March 2013
** Company decided against selling itself, slashes dividend by 70 pct and asked its CEO to step down
** Long-term debt risen nearly four times to about $1.8 billion from 2010 to end of June
** Stock has shed nearly three fourth of its value in the same period, despite a 9.5 pct gain this year on the NYSE
** The gain compares with a 13 pct rise in the stock this year through Monday's close on the Toronto Stock Exchange (Reuters Messaging: email@example.com)
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