Cloud Computing and Cloud Services stocks fell a tiny 0.55 percent for the week ending April 13, 2012, according to our Talkin' Cloud Stocks Index. The biggest weekly losers were Carbonite, Citrix Systems and NetSuite. The biggest weekly winner was CommVault. Here's the blow by blow.

Carbonite (CARB) saw shares drop about 8.47 percent the week ending April 13. The cloud storage and online backup company will announce Q1 2012 results on May 1. Investors are wondering if Carbonite can grow profits even as marketing initiatives grow as well. Also, key rival Mozy announced a new channel partner program for resellers pushing into the cloud.

Meanwhile, Citrix Systems (CTXS) acquired Podio for business-focused social media, sending Citix's own shares down 4.04 percent for the week. Most pundits are watching Citrix closely because the company has virtualization and cloud initiatives that could rival VMware and OpenStack, in particular. For background, take a look at how CEO Mark Templeton has evolved Citrix over the past two decades.

Also, NetSuite (N) saw its shares fall 3.12 percent for the week. The cloud-based ERP provider will announce Q1 results on April 26. NetSuite didn't share any major news this past week, but investors may simply be wondering if cloud stocks needed a breather -- having climbed roughly 25 percent in Q1 2012.

The week's one big winner was CommVault (CVLT). Shares in the storage-focused company rose 4.48 percent during the week.  CommVault will announce quarterly results on May 8. The CommVault partner program includes resellers, strategic partners, technology partners and service providers.

Overall, our Talkin' Cloud Stocks Index is up 24.22 percent since the start of 2012 -- though cloud computing stocks have dipped ever-so-slightly in the past two consecutive weeks.

We update the Talkin' Cloud Stock Index each Friday, after U.S. markets close. The index helps us to measure cloud computing hype vs. reality. We don't make buy, sell or hold recommendations.