A lawsuit filed against Morgan Stanley for the mis-sale of snowball notes in a California District Court two weeks ago could become a blizzard of lawsuits, according to lawyers in the case. The plaintiffs’ legal team will seek to elevate this case to class action status to include all so far unidentified investors who also invested in the products, and may broaden the campaign to other providers.Calling a 6%-plus haircut a case of ‘heads I win, tails you lose’ for the ‘fixed income’ investments,