BUZZ-Bombardier Inc: Air Baltic raises firm orders for CS300 aircraft
** Canadian aircraft and train maker's shares up 4.7 pct at C$1.33
** Latvian carrier Air Baltic Corp raises firm orders for CS300 aircraft to 20 by converting 7 option planes to firm
** Based on list price of CS300 airliner, order is valued at about $506 mln
** Bombardier announced 10 firm orders for CS300 aircraft and option for another 10 planes from Air Baltic on Dec. 20, 2012; Air Baltic converted 3 option aircraft to firm in February 2014
** Up to Monday's close, stock had fallen 95 pct this year
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