The Nasdaq this week has slipped below the 5,000 high-water mark it reached last week. The last time it hit above 5,000 was in March 2000.

Back then, investors were riding high, only to suffer a sickening fall as the technology-heavy index lost half its value by year-end. Fifteen years later, investors are worried another bubble may be on the horizon. But much has changed since the turn of the century. And while some sectors may appear over-valued, we believe others still have room to grow.

Y2K versus today

At the dawn of the new millennium, sock puppets and “burn rates” were all the rage. It seemed all a company needed to do was add an “e” to the front of their name or a “.com” to the end to pull in investments. However, companies like, despite clever commercials, failed completely.

Today, earnings matter. In a slow-growth world, investors generally favor industries and companies that have the potential to deliver solid earnings, not just because they’re trendy. Mature tech is a good example because, as I’ve mentioned in other blog posts, it is poised to benefit from the pro-cyclical environment and an expected increase in capital expenditures.

Let’s take a look at five things that have changed in the last 15 years:

1.  The Nasdaq Composite Index itself looks very different now.

Y2K: Tech reached as high as 65% of the index, and telecom was 12%.

Today: Tech represents 43% and telecom is less than 1%, offering more diversified exposure with other sectors.

2.  Dominant names are different. In fact, only three of the top 10 stocks, based on market cap, remain the same.

Y2K: Apple, which had just introduced a basket of fruit-colored iMacs, was not even among the 10 largest Nasdaq stocks. And its market    cap was around $22 billion.

Today: Apple is the most valuable company in history at more than $750 billion as iPads and iPhones are everywhere you turn.

3.  New entrants have come on the scene.

Y2K: Mark Zuckerberg would have been applying for a driver’s license.

Today: Facebook is a household name globally and one of the largest companies in the world by market cap.

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