1. ProFunds Internet UltraSector Fund (INPIX), up 58% this year.
This $31 million fund has risen 38% in the past three months. Last year, the fund returned 128% after plummeting 62% in 2008.It has relied on a highly leveraged, quick-on-the-draw trading strategy and is recommended for professional investors only. The portfolio turnover is a dizzying 622%. Although Google (GOOG), at 7.3% of the fund, has hurt performance, its managers have made up for it with its rapid-fire portfolio turnover and some stellar stock picks including: Salesforce.com (CRM), 3% of the fund and a 101% return; Amazon (AMZN), 5%, 31% return; and the top gainer, TIBCO Software (TIBX), a developer of business-process-management and optimization software, 1.7% of the fund, and up 117% this year. -- Written by Frank Byrt in Boston.