The repercussions of the horrendous act of terrorism witnessed Tuesday have already been felt far and wide. Without delving into the ramifications of that act (since it is unfathomable to begin with), will try to make sense of what it might mean for the stock market when trading is resumed. All things considered, though, that task is difficult at this juncture since there is no indication yet as to exactly when the market will re-open. It has been said that it could be as early as tomorrow morning, but no later than Monday. In any event, using history as our guide, this is what we know. History has shown that the market typically encounters some intense selling pressure in the early stages following a catastrophic event as fear and uncertainty take hold. We have already seen that the initial reaction in foreign markets was decidedly negative as they first reacted to the news of the terrorist attack on the United States; losses ranged anywhere from 4-12%. In the event of a similar selloff in the U.S., we would expect the airline, hotel, cruise line, insurance, retail, banking and brokerage issues to be among the hardest hit initially. Conversely, the stocks Briefing.com expects to exhibit better relative strength than others include the defense, gold, energy, beverage, food, drug, utility, telecom, wireless, construction and rental car issues. On the bright side, history has also shown that emotionally-driven selloffs in the wake of a catastrophic event are typically . Already, we are seeing such signs in foreign markets, which posted broad-based gains in Wednesday's action and are trading stable today. That resilience, if it holds until the U.S. market re-opens, should help mitigate some of the expected selling pressure in the opening stages of trading and perhaps pave the way for a relatively reassuring start for the U.S. market when it re-opens. Aside from that, the coordinated efforts on the part of central banks around the globe to ensure an orderly market, and to stimulate economic growth, should provide investors/traders with a measure of confidence that an initial selloff will be short-lived.