(Reuters) - Morgan Stanley reported a 9 percent drop in quarterly profit on Wednesday as equities and bond trading fell due to low market volatility.The bank said earnings attributable to common shareholders fell to $2.34 billion (£1.80 billion), or $1.39 per share, in the first quarter ended March 31, from $2.58 billion, or $1.45 per share, a year ago. https://mgstn.ly/2vaVd4IOn an adjusted basis, the company earned $1.33 per share.Analysts were looking for a profit of $1.17 per share,..