    Sentence 1: Since March i, when the market  Ss major indices were at their lowest levels  since hitting mult-year lows in October , the  tech-aden Nasdaq has climbed nearly 20  per cent.    Sentence 2: Since March 11, when the  markets major indexes were at their lowest  levels since hitting multiyear lows in October  the tech-laden Nasdaq has climbed nearly  20 percent .