It's no secret to say the stock market as a whole has been more or less on fire for the last several years. As we approach the five-year anniversary of the stock market's Great Recession bottom in 2009, the S&P 500 now finds itself up roughly 175% from those lows.

It's also no great insight to note that technology stocks have performed even better than the broad market. Over the same five-year period, the tech-weighted Nasdaq, as well as small- and large-cap tech stocks, outperformed the market in general.

So what could be wrong?
The natural downside in all this is that now technology stocks have gown increasingly expensive, especially as companies like Facebook (NASDAQ:FB) and Twitter (NYSE:TWTR) change hands at what could be fairly described as aggressive current valuations.

However, despite their current rich premiums, one well-known research house recently came out in favor of technology stocks. So with high-flying stocks like Facebook and Twitter having grown so expensive, how should investors approach both the broader technology sector and specific opportunities like Facebook or Twitter?

In the video below, tech and telecom analyst Andrew Tonner gives his thinking on the tech sector as a whole and specific growth powerhouses like Facebook and Twitter.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.