BUZZ-Bombardier rally continues on speculation of Delta order
** Canadian aircraft and train maker's shares up 4.2 pct at C$1.48, its smallest gain in ongoing three-day rally
** Speculation of potential Delta Air Lines order for CSeries sends Bombardier stock up as much as 9.8 pct to a more than 5-month high of C$1.57
** Delta, said to be considering buying small narrowbody jets, says no decision yet about purchases
** Bombardier's rally follows Latvian carrier Air Baltic raising firm orders for CS300 to 20 on April 12
** A major customer would give momentum to the single-aisle CSeries as it prepares to enter service after years of delays and cash problems
** Up to Wednesday's close, Bombardier's stock had fallen 45 pct in the past 12 months
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