High-profile deals breathed fresh life into stocks today, snapping a 3-day losing streak. Xerox will buy outsourcing company Affiliated Computer Services for $6.4 billion, and Johnson and Johnson bought biotech firm Crucell for $442.7 million. Barring sharp losses in the days ahead, this quarter will have seen the biggest gains in over 10 years. The Dow rose 124.17 points to close at 9,789.36. The Nasdaq gained 439.82, settling at 2,130.74, while the S&P 500 added 18.60 to close at 1,062.98.