The index gained 7.48 points, or nearly 1 percent, to close at 772.50.
The major indexes each gained more than 1 percent this week.
For the first three months of 2004 alone, the index gained 32.7 percent.
Over the next 12 months, the index would gain 3,000 points.
The index had gained 204.27 points earlier in the week.
On Friday, the index gained 124.01 points, or less than 1 percent.
Since the start of the month, the index has gained more than 14 percent.
Overall, the index has gained just 3 percent in 12 months.
For the year, the index has gained just 92 points, or about 1.4 percent.
The index had gained 51.90 points on Tuesday to close at 31,880.65.