There were limited reactions to the attack in the world economy as measured by financial market and exchange rate activity. The value of the British pound decreased 0.89 cents to a 19-month low against the US dollar. The FTSE 100 Index fell by about 200 points during the two hours after the first attack. This was its greatest decrease since the invasion of Iraq, and it triggered the London Stock Exchange's 'Special Measures', restricting panic selling and aimed at ensuring market stability. By the time the market closed it had recovered to only 71.3 points (1.36%) down on the previous day's three-year closing high. Markets in France, Germany, the Netherlands and Spain also closed about 1% down on the day.