The network often sees large spikes in viewership on days of major market moves. During the week of February 27, 2007, when the Dow Jones Industrial Average had its seventh-largest loss ever, CNBC's continuing coverage of events resulted in its best ratings week since the market crash after the September 11, 2001 terrorist attacks, with "Kudlow & Company", "Mad Money", and "Fast Money" recording their best ratings ever in the coveted 25-54 demographic. When the financial crisis wreaked havoc in the worldwide equity markets, CNBC recorded some of the highest ratings in the network's two-decade history. For the week ending September 19, 2008, the network averaged 502,000 viewers during the "business day" (defined by the network as 5 a.m. to 7 p.m.). During this week, "Squawk Box", "Closing Bell", "Fast Money", "Mad Money" and "Kudlow & Company" recorded their best viewership figures ever. On September 29, 2008, when the markets faced their worst single session performance since the crash of 1987, CNBC saw its best ratings day ever, with an average 726,000 viewers tuning into the network during the business day.