This Week's ETF Winners & Losers

A number of exchange-traded funds gained ground for the week, and those tracking energy and oil ranked among the best performers.

The Oil Service HOLDRs (OIH Quote) rose 3.9% over the past five days, and the PowerShares Dynamic Oil & Gas Services (PXJ Quote) fund tacked on 4%. The iShares Dow Jones U.S. Energy Sector (IYE Quote) and Ultra Oil & Gas ProShares (DIG Quote) spiked 4.3% and 7.9%, respectively.

While crude oil saw erratic day-to-day movements, repeatedly hitting new record highs before succumbing to profit-taking, in the end it reaped gains for the week, ending at $126.29 a barrel.

Among energy stocks, Exxon Mobil (XOM Quote), Chevron (CVX Quote) and ConocoPhillips (COP Quote) added 3.1% or more.

Gold also had a good week, as futures on the metal lifted to end the week just shy of $900 an ounce. Since Monday, the Market Vectors Gold Miners ETF (GDX Quote) ramped up 3%. The iShares COMEX Gold Trust (IAU Quote) and the streetTRACKS Gold Trust (GLD Quote) rose roughly 2% apiece.

Various corners of the tech sector were also on the rise amid a series of uplifting news items. Research in Motion (RIM Quote) kicked off the week by releasing its new BlackBerry Bold smartphone product, which is seen as a possible rival to Apple's (AAPL Quote) iPhone, and RIM shares ended up 5.3% for the week. Apple climbed 2.3%.

The Wireless HOLDRS (WMH Quote) fund climbed 3.1% over the past five days, and PowerShares Dynamic Telecom & Wireless (PTE Quote) moved up 4.7%.

Also, the Vanguard Information Technology ETF (VGT Quote) climbed 3.8% during a week in which Hewlett-Packard (HPQ Quote) inked a deal to take out Electronic Data Systems (EDS Quote) for $13.9 billion. EDS shares propelled 29% higher for the week. H-P lost 3.8%,