Jan. 8 (Bloomberg) — U.S. stocks fluctuated, after equities rebounded yesterday from a three-day retreat, as investors weighed a private report showing companies added more workers than forecast last month.

Twitter Inc. dropped 3.5 percent, falling for a third day, amid an analyst downgrade. Ford Motor Co. gained 1.2 percent after Chief Executive Officer Alan Mulally ruled himself out from a race for the top job at Microsoft Corp. Micron Technology Inc. jumped 9.8 percent after reporting quarterly revenue that topped estimates. Forest Laboratories Inc. climbed 16 percent as it agreed to buy Aptalis Pharma for $2.9 billion.

The Standard & Poor's 500 Index rose 0.1 percent to 1,839.14 at 10:22 a.m. in New York, after falling as much as 0.4 percent earlier. The equities benchmark climbed 30 percent last year, the most since 1997. The Dow Jones Industrial Average slipped 48.34 points, or 0.3 percent, to 16,482.60.