Most Moves Narrow 3Izpst Mcrves  
NEW YORK, Feb. 18 UP)ÛÓThe stock market nudged ahead slightly today and set its second record in two days for the lightest trading of 1958.</br></br>Heavy snow and freezing temperatures in the eastern United States were still reckoned as factors in keeping a portion of market-minded folk away from places where stocks are dealt.</br></br>Volume dropped to 1,680.000 shares compared with 1,700,000 yesterday and once again was the smallest since Nov. 11 when 1,540,000 shares were traded.</br></br>IVfost key stocks showed narrow plus or minus signs. A few specially situated stocks made wider moves.</br></br>The dayÛªs feature was Lorillard which had made an amazing advance in the past year. The word was passed that time was ripe for taking profits. The stock repeated yesterdayÛªs role as the market leader as it sank under heavy selling.