    Sentence’ 1: Since. March: 11”, when. -the-  market's «major indexes’ were at’, their,  lowest levels since hitting multi-year lows  in October. ,-the. Nasdaq has barpeled back’  21.2'percént. .         Setitencé 2: Since March "11 :when ‘thé  mafket~'s-‘major’ indices’ were ‘at. their.  lowest ‘levels. since hitting; multi-year lows  in October , the tech-laden: Nasdaq’ has.  climbed nearly 20-per cent.    