Stocks tumble as Street worries about financials

Wall Street sank further Tuesday, extending its heavy losses as enthusiasm over Federal Reserve efforts to inject confidence into credit markets gave way to concerns about financial companies' balance sheets.

• Fed to buy massive amounts of short-term debt AP
• Bernanke: Crisis could prolong economic pain AP
• Fed minutes show policymakers saw balanced risks AP
• August borrowing drops at 3.7 percent rate AP
• Retirement accounts have lost $2 trillion AP
• Oil prices recover slightly after steep drop AP
• Insurance giant AIG's role in market crisis probed AP
• Credit markets ease a bit on Fed move to buy paper AP
• Eli Lilly settles Zyprexa inquiries in 32 states AP