For Americans thronging to dollar stores in these recessionary times, there’s some new stock available. Citigroup Inc’s shares, available at $55.7 at their peak in late 2006, are now trading at less than a dollar. According to a Bloomberg report, NYSE Euronext, which owns the New York Stock Exchange has suspended till June 30 a rule that delists companies trading below a dollar after six months — the way the financial crisis is deepening, there could be a lot more stocks finding their way into dollar stores.