A rally in technology and telecommunications stocks seems to be far from over. Research in Motion ( RIMM) jumped because of better-than-expected results from the BlackBerry maker and indications that revenue and profit growth are likely to continue. Tech investors also focused on IBM ( IBM) and Sun Microsystems ( JAVA), as the two firms huddled in what was described as late-stage merger talks. Speculation was that IBM would end up paying $9.55 a share for Sun, about a dollar less than originally expected. Of the major Dow Jones industry indexes, the telecom index rose the most, by 2.9%, in the five sessions ended April 2, and the technology index was second-best, up 1.8%. The 10 best-performing tech/telecom funds, summarized in an adjoining table, posted gains of as much as 8% for the week. Although price volatility and longer-term performance earned them marks equating to "hold" (for grades in the "C" range) and "sell" (marks in the "D" and "E" ranges) recommendations from TheStreet.com Ratings, they have shown resistance during recent market declines and have performed on the forefront of funds during rallies. If the March rally ultimately turns into a sustained bull market, tech/telecom has plenty of room for growth. For example, the iShares S&P North American Technology Multimedia Networking Index ( IGN), Wisdom Tree International Technology ( DGT) and Rydex Series Telecomm ( RYTLX) are down by 34% to 36% over the past year. So if an emerging bull market were to carry them back to levels of a year ago, each would advance more than 50%. By that same logic, the PowerShares DWA Emerging Market Technical Leaders Portfolio ( PIE), would enrich its holders by 133%.