The Stock of Exchange crash followed at the Sept. 11th attack, is similar to the October 1987 Wall Street Crash, which followed the European crisis began since May 1986.Also at the beginning of 1986 in Europe there was a real increase in shares prices which formed a "bubble" and, beginning from May 1986 , the Main Bourses crashed, but, at the time, the scenary on interests rates was quite different : in Italy ant G.B rates were at high level, France medium level, and Germany had low interests rates.The crisis began from there and on Oct. 1987 the heavy Wall Street crise kept the market down for a long period.Personally, I was not invested on stock Market at that time. On march 2000 the Main Markets were realy hign and the crisis began followed by recession on many Countries, but all civilized Countries, had low interests rates, with the exception of U.S.A. which started to decrease since January 2001, but the Sept. 11th attack put all the Bourses down.Personally I gave up most of the Stock Investments on May 2001 during the last stock-market up(followed from both European and Usa interests rate cuts).In both cases there are 17th month from the beginning of the crise to the bottom.In the 1986-1987 crise, there was a long period to recover, because in 1990 the Iraq-Kuwait war started and also the beginning of Ex-Jugoslavia conflicts.In the Sept. 11th crise we don't know at the moment the entity of the conflict, but it seems to be long, moreover other conflicts like the Israel-Palestinian, Eire etc. are keeping Countries under control and stock markets chained