Worries about the health of Americans' home mortgages, some disappointing manufacturing data, plus the expiration of futures and options made for a volatile week in the stock market.
The key indices ended the week lower, with the Dow losing 1.4%, the S&P 500 off 1.1% and Nasdaq down 0.6%.
The market started out the week with a gain but by Tuesday, stocks were caught in a down draft. The Dow Industrials' 240-plus point decline Tuesday ended a string of up days that had kept the blue-chip index above its March 2 low of 12,114.10.
Investors were again jolted Wednesday when the Dow made an intraday move below the psychologically important 12,000-level for the first time since Nov 2006. The market wound up closing higher that day but the 263-point trading range highlighted ongoing investor uncertainty.
A surprise spike in producer prices in February on both the headline and core levels failed to stoke inflation fears, a week ahead of the FOMC's latest meeting on interest rates, and the market posted another modest gain Thursday.
The CPI behaved more predictably than the PPI in February and the data's release set a positive tone for the open Friday. Regional manufacturing data from the Philadelphia Fed was surprisingly weak as was data in the New York region's Empire State Manufacturing Survey.
Here's a look at the market this week through the eyes of our top market watchers.