THE Dow Jones industrial average launched several unsuccessful forays into the 7,800 threshold this week. The blue-chip indicator briefly rose above the barrier on several occasions during the week but was beaten back each time by bouts of profit taking. In sharp contrast to its performance last week when it spun a string of five record closes and three 100-point marks the Dow had to settle with one new high. Wall Street spent the first three days of the week giving back a modest portion of last week's record gains. However, the Dow rebounded 58.35 points on Thursday and added 19.45 points on Friday to end the week at a record 7,796.51. Nevertheless, Smith Barney technical analyst William Raftery said the stock market 'remains extremely bullish'. Joseph Barthel, director of investment strategy at Fahnestock & Co, said: 'I don't see anything over the near-term horizon that will sort of deflate the balloon.' While some analysts ventured to forecast a Dow 8,000 in the near future, a well-known bull made a bold prediction. Ralph Acampora, director of technical analysis at Prudential Securities, said he expected the Dow to climb to 10,000 by next June. The broader indexes also improved on last week's record levels. The New York Stock Exchange composite index rose 2.67 points to 467.84 after climbing 17.04 last week. Meanwhile, the Standard & Poor's 500 Index advanced 5.43 points to 898.70 after jumping 35.26 the previous week. The technology-weighted Nasdaq Composite Index jumped 24.07 points to 1,447.10 after rising 18.19 points last week. But the American Stock Exchange Composite Index, which climbed 15.45 points a week ago, retreated 6.83 to 623.27. Advances outpaced declines 1,658-1,367 among the 3,516 issues traded on the New York Stock Exchange. Weekly Big Board volume eased to 2,645,838,417 shares from last week's 2,687,083,330, but rose from 2,017,549,570 a year ago.