Fund fees and expenses are presented as a percentage of both common shareholder capital and total fund investment capital. The first column portrays the costs directly and indirectly borne by common shareholders. The second column portrays the costs borne by the Fund on its total investment capital, which includes common assets as well as assets attributable to the Fund's issuance of senior securities (e.g. preferred shares and debt). This column enables a common shareholder to better understand how fund expenses impact portfolio investment returns. Interest expenses from leverage represent costs associated with the Fund's financing activities, which are distinct from the costs associated with the Fund's underlying core operations. Certain leveraging instruments including repurchase agreements (repos) are sometimes more efficient forms of leverage, but when used, the costs are difficult to accurately disaggregate and are not shown here.

For Class A1 and Class A2 Common Shares, the Fund has adopted a Distribution and Servicing Plan. The Distribution and Servicing Plan permits the Fund to compensate the Distributor for using reasonable efforts to secure purchasers of the Fund's Common Shares, including by providing continuing information and investment services and/or by making payments to certain authorized institutions in connection with the sale of Common Shares or servicing of shareholder accounts. The maximum annual rates at which the distribution and/or servicing fees may be paid under the Distribution and Servicing Plan (calculated as a percentage of the Fund's average daily net assets attributable to the respective common share classes) is 0.75% for Class A1 and 0.50% for Class A2. Please refer to the prospectus for more information about fees and expenses.

Other Expenses and Total Expenses do not include interest expenses arising from the application of SFAS No. 140 to certain inverse floating rate securities (if any) held by the Fund. Interest expense arises because accounting rules require the Fund to treat interest paid by trusts issuing certain inverse floating rate instruments held by the Fund as having been paid (indirectly) by the Fund. Because the Fund also recognizes a corresponding amount of additional income earned (also indirectly), the Fund's net asset value per share, net investment income and total return have not been affected by this accounting treatment. See the Fund's Annual Report for information on the Fund's inverse floating rate investments and recognized interest expense.​

Expense ratios are calculated using the prior 12 months of expense data as of the previous month-end, except for new funds where the prospectus expense ratios are used for the first full three months following the Fund’s inception. After the initial three months, actual expenses, annualized, are used until a full 12 months of expenses have been recorded. Annualized leverage financing expense is included if the Fund was leveraged as of the previous month end.

Exposures and breakdowns are asset-weighted using the current market value of bonds held in the portfolio, as well as the full amount and exposure of bonds held in a tender option bond (TOB) trust, even though the Fund owns only the residual inverse floater in its portfolio and managed assets. This may not be fully consistent with generally accepted accounting principles.

All characteristics as a percentage of the fund's total net assets. Holdings and ratings are subject to change. Totals may not add up to 100% due to rounding.