Maybe because they received the notice before the NYSE rule change last Wed? The new rule was announced Friday the 14th. Maybe the NYSE made the change to the rule because FNM and FRE were about to get the notice of delisting.
"In a regulatory filing, Fannie Mae said the notice arrived Wednesday. The NYSE requires that the average closing price of a stock remain above $1 per share. Fannie Mae stock, which a year ago was trading as high as $40.45, closed at 47 cents Tuesday."
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