In January 2000, Kenneth Lay and Jeffrey Skilling announced to analysts that they were going to open trading for their own "high-speed fiber-optic networks that form the backbone for Internet traffic". Investors quickly bought Enron stock following the announcement "as they did with most things Internet-related at the time", with stock prices rising from $40 per share in January 2000 to $70 per share in March, peaking at $90 in the summer of 2000. Enron executives obtained windfall gains from the rising stock prices, with a total of $924 million of stocks sold by high-level Enron employees between 2000 and 2001. Head of Enron Broadband Services, Kenneth Rice, sold 1 million shares himself, earning about $70 million in returns. As prices of existing fiber optic cables plummeted due to the vast oversupply of the system, with only 5% of the 40 million miles being active wires, Enron purchased the inactive "dark fibers", expecting to buy them at low cost and then make a profit as the need for more usage by internet providers increased, with Enron expecting to lease its acquired dark fibers in 20 year contracts to providers. However, Enron's accounting would use estimates to determine how much their dark fiber would be worth when "lit" and apply those estimates to their current income, adding exaggerated revenue to their accounts since transactions were not yet made and it was not known if the cables would ever be active. Enron's trading with other energy companies within the broadband market was its attempt to lure large telecommunications companies, such as Verizon Communications, into its broadband scheme to create its own new market.