The following video is from Wednesday's installment of The Motley Fool's Weekly Tech Review, in which analysts Eric Bleeker and Jason Moser look at the biggest stories driving the tech sector this week.

Microsoft's (NASDAQ:MSFT) five-year performance is on par with that of Qualcomm (NASDAQ:QCOM) -- stunning when you consider Microsoft has a negligible smartphone presence and Qualcomm has become the Intel of the mobile world. That brings up an interesting question: Have smartphones actually been a winning investment?

After all, while companies such as Apple (NASDAQ:AAPL) -- in spite of its recent share-price struggles -- have been winners, there have also been a host of losing investments. Over a five-year time frame, an investor who'd bet equally between BlackBerry (NASDAQ:BBRY) and Apple would still be beating the Nasdaq over the same time period, but not by a tremendous sum. 

As Eric describes in the video, while PCs showed nearly continuous growth over 30 years, smartphones are on a different trajectory. Little more than a half decade after the iPhone and Android started taking off, investors are already concerned that growth in the high-end smartphones that bring in the most profit is stalling. Simply put, PCs had slower growth across those 30 years, but they also had a long time period where investors weren't fretting about future PC growth.

That means that while mobile companies such as Apple have racked up historic earnings in recent years, the focus on future growth has cut back share price growth of mobile companies during the past year. To see Eric and Jason's full thoughts, watch the following video. 

The relevant video segment can be found between 3:15 and 7:43.

Eric Bleeker, CFA, and Jason Moser have no position in any stocks mentioned. The Motley Fool recommends Apple and owns shares of Apple, Microsoft, and Qualcomm. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.