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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: ( 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.

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