Venture capital investment in U.S. companies hastened its descent in the fourth quarter of 2008 with 554 deals garnering $5.5 billion, down 30% from the $7.9 billion invested in 718 deals during the same period in 2007 and the lowest quarterly investment the industry has seen in three years, according to statistics released by Dow Jones VentureSource. In total, 2008 saw 2,550 deals completed and $28.8 billion in venture capital invested in U.S. companies, down 8% from 2007 when $31.4 billion was invested in 2,823 deals but still ahead of the $28.2 billion invested in 2006.