at the close Thursday in heavy volume, pressured by earnings warnings and an economic report that points to more economic weakness ahead. New and old warnings continued to pressure stocks on Thursday. Motorola lowered revenue forecasts and announced another major layoff, following similarly bad news earlier in the week from Swedish rival Ericsson. Dealers said lingering disappointment over Alcatel's warning on Wednesday was also pressuring the market. The Dow industrials closed down 192.43, at 9,840.84 while the Nasdaq composite was off 53.37 -- 3.03% -- to 1,705.64. The S&P 500 was down 25.34 -- 2.24% -- to 1,106.40. After the close Intel issued a statement saying it was maintaining its previous guidance.