All the talk about nationalizing the banks is spooking Wall Street. Shares of Bank of American and Citigroup have dropped all week. Now, Bank of America is trading around $3—a price not seen since 1984—while Citi rests at $2, down 20 percent today alone. Both are slim fractions of their valuations from just a year ago. "People are looking at the worst-case scenario, which is either a complete nationalization or Bank of America and Citi having to raise so much common equity that they dilute shareholders. It seems to me either one is a possibility," one analyst said. "No one wants to get involved with these banks."