Photo: Shankar S/Flickr (CC BY 2.0).

The stock market just finished an up-and-down kind of week. The major indexes took a quick dip early in the week but ended up on a modestly positive note; The charts showed gains between 0.4% and 1% between Monday morning and Friday night.

But some tech stocks missed that mildly rosy finished and plunged by double-digit percentages instead.

This is their story.

Remote healthcare operator Teladoc (TDOC 3.31%) lost a major customer on Friday, immediately triggering a 19.5% loss for the week. Cloud-based security and storage vendor Barracuda Networks (NYSE: CUDA) published a pretty decent quarterly report on Tuesday, but weak forward guidance led to a 29% haircut. And specialized communications infrastructure vendor Comtech Telecommunications (CMTL -10.23%) plunged 18.5% because of a downright disappointing fourth-quarter report.

Want to dig deeper into these recently underperforming tech stocks? Start with the slideshow below: