(MONEY Magazine) – The MONEY 30, an index of blue-chip growth stocks that are at the forefront of today's economy, fell 1.8% from March 17 to April 27 to 4,119 (January 1996=1000). Most tech stocks in the index posted double-digit declines, reflecting April's Nasdaq sell-off. Microsoft saw one-third of its market value evaporate on fears about a potential breakup of the company, which has been found guilty of violating antitrust laws. Motorola was pummeled after it warned of a potential slowdown in coming months. With tech stocks tumbling, other sectors--from retail to health care--benefited as investors sought safer ground. UnitedHealth gained 21.2% on hopes for higher earnings. Even long-suffering Mattel showed signs of life: Its stock spiked more than 20% following news that it had narrowed its quarterly losses and plans to sell its ailing interactive software unit, the Learning Company. The toymaker is still down 52% over the past year. --ERICA GARCIA