It's taken 15 years for the Nasdaq composite index to approach the record high of 5,048 it reached back in March 2000, at the height of the tech-stock boom that would later collapse. On Monday the index closed above 5,000 points for the first time since hitting its peak. Here are some things that have changed since then, in the index and in the U.S.
Biggest company in the index
2000: Microsoft ($525 billion)
2015: Apple ($759 billion)
Biggest industries in index
2000: Technology, 64.9 percent; Telecommunications, 11.8 percent; consumer services, 7.7 percent.
2015: Technology, 43.3 percent; Consumer services, 20.8 percent; Health Care, 16.1 percent.
Number of tech stocks in the Nasdaq:
In the news
2000: Y2K bug, controversy over Cuban immigrant boy Elian Gonzalez, U.S. Presidential election between George W. Bush and Al Gore. "American Beauty" wins Oscar for Best Picture.
2015: Killings of French cartoonists over depiction of prophet Muhammad; U.S. moves to normalize relations with Cuba; identity of Islamic State militant shown beheading hostages is revealed. "Birdman" wins Oscar for Best Picture.
Index data supplied by Nasdaq.