What are the disclosures required for marketable securities?

For the marketable securities the following disclosures are required – 

• Aggregate cost and market value of the separate portfolios as of the balance sheet date, with identification as to which is the carrying amount.
• Gross unrealized gains or losses related to market value over cost or cost over market value for all marketable equity securities in the portfolio.
• Net realized gain or loss included in income determination, the basis on which cost was determined and the change in the valuation allowance that has been included in the equity section of the balance sheet during the period and, when a classified balance sheet is presented, the amount of such change included in the determination of net income.