NEW YORK ( TheStreet) -- Penny stocks have gotten punished as investors sold the riskiest shares since the April sell-off. The following 13 companies received notice in December that they failed to trade above $1 a share for a certain period, a Nasdaq requirement, and now they face delisting after a six-month grace period. Their possible fate: languishing on the thinly traded Pink Sheets.Altair Nanotechnologies (ALTI)
Small-Caps Put on Nasdaq Chopping Block
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