The full import of the Asian economic debacle is still not fully  appreciated on Wall Street, some economists warn. 
Last week stocks enjoyed a giddy rally Wednesday after the Federal  Reserve intervened in currency markets to stabilize the beleaguered   Japanese yen.   
  
But propping up the yen, even if successful, will not have any short-run  impact on the large and growing U.S. trade deficit, cautioned Ian   Shepherdson, chief U.S. economist at HSBC Securities, New York.   
He said he expects the monthly trade gap to hit $20 billion by yearend.  And that could slow the growth of the nation's gross domestic product to an   anemic 1% annual rate, versus the sizzling 4.8% pace of the first quarter.   
  
The Commerce Department said last week that the U.S. goods and services  deficit deepened to $14.6 billion in April. That was far larger than the   $13 billion that had been expected and means the U.S. economy is almost   bound to slow soon.     
Mr. Shepherdson pointed out, however, that the damage has so far been  done mostly by weaker U.S. exports-down 15% in April from a year earlier.   Meanwhile, import growth from the traumatized Asian economies has actually   slowed.     
That means the widely expected surge of cheaper Asian imports has not  yet begun to arrive, probably because manufacturers in the region have   lacked financing. "This situation will not last indefinitely," the   economist said.     
  
"We remain convinced that Wall Street is underestimating the effect of  the Asian crisis on the U.S. economy," Mr. Shepherdson said. "The monthly   trade deficits routinely exceed expectations.   
"The drop in export growth, from last year's 10.2% to a possible zero  this year, is big enough alone to reduce GDP growth by 1.25%," he said.   "Add in the impending import hit, and it is not too difficult to imagine a   net Asia effect of close to 2%.     
But the Wall Street consensus view of the Asian drag on the economy this  year still appears to be more like 0.5% to 0.75%, he said. 
If the financial markets do not yet grasp the full dimensions of the  Asian crisis, the Fed now does, given its "drastic step of intervening to   support the yen," Mr. Shepherdson said.   
  
But Bruce Steinberg, chief economist at Merrill Lynch & Co., said he  expects the yen to weaken further against the dollar this year, deepening   the economic malaise in Japan and elsewhere in Asia.   
"Since the dollar's uptrend versus the yen began in March 1995, there  have been periodic yen rebounds," he said. "But no rebound has persisted   for much more than a month.   
"The yen has gone on to plumb new lows after each brief moment of  strength," he said. "We expect a similar performance this time around." 
Mr. Steinberg noted that the U.S. currency intervention was apparently  based on new assurances by Japanese policymakers that they will speed up   resolution of bad bank debt and let more banks fail.   
"Of course, such promises have been made in the past," he said, noting  that the Japanese finance minister has since come out against further loan   disclosure requirements.   
But even if Japan were to take the actions needed to purge its economic  system of trouble, the nation's currency and economy would have to get   weaker before getting stronger, he said.