Range accrual notes are becoming popular with investors looking for higher yields amid a rough and range-bound market, according to Kotak Mahindra Bank. The notes offer exposure to debts and equity derivatives - overwhelmingly index options - with the majority of assets devoted to bank fixed deposits and bonds, and under a third invested in index options. "Investors are not seeing returns from their equity investments and their debt portfolios are logging negligible to low post-tax gains. This