The fund also made money in Sycamore Networks, in Chelmsford, Mass.

His telecommunications company, Sycamore Networks, was listed on the Nasdaq in October.

Sycamore Networks lost $9, to $56.13.

A couple that fall in that category are Sycamore Networks and Foundry Networks.

Sycamore Networks, for instance, really has developed innovative optical networking technologies.

Subsequently, with the help of MIT researchers, he launched Sycamore Networks in 1998.

Sycamore Networks went public in October 1999, and raised a market cap of $18 billion.

Six of those seven are trading below where they ended that first day, with the only exception being Sycamore Networks, which markets optical networking products.

And several public companies are already developing products in this field, too, including Sycamore Networks.

Sycamore Networks and Extreme Networks each warned of a surprise loss late Thursday.