Y'day's weakness to 90.33 in NY due to cross unwinding in yen carry trades suggests intra-day downside bias re- mains, however, below 90.01 needed to extend re-cent 'erratic' fall fm 92.12 to extend marginally lower but reckon 89.60/70 wud hold.    On the upside, abv 91.10/12 wud prolong near term choppy sideways trading n yield gain twd 91.48.