Weighted average life (WAL) to worst represents the weighted average number of years for which each dollar of unpaid principal on a fixed-income security remains outstanding. This calculation is made by making the worst-case scenario assumptions on the issue, assuming any prepayment, call, or sinking fund options are used by the issuer.

Weighted average effective duration of the securities comprising the fund portfolio or the index. Effective duration takes into account any embedded options (i.e., a put or a call) and reflects the expected change in future cash flows caused by the options in response to changing interest rates.

Yield to maturity is the internal rate of return earned by an investor who buys the bond today at the market price, assuming that the bond will be held until maturity, and that all coupon and principal payments will be made on schedule.

Average Price excludes zero coupon, interest only and principal only bonds, preferred securities not priced at 100 par, and other alternative sector buckets when applicable.

SEC 30-day yield is based on net investment income for the most recent 30-day period, is annualized and is divided by the offering price at month-end.

Source: BlackRock Solutions and Bloomberg Barclays. The fund credit quality ratings are measured on a scale that generally ranges from AAA (highest) to D (lowest). All securities except for those labeled “Not Rated” or “Other Fixed Income” have been rated by a Nationally Recognized Statistical Rating Organization (“NRSRO”). For purposes of this presentation, when ratings are available from more than one NRSRO, the highest rating is used. Guggenheim Investments converts ratings to the equivalent S&P rating. The index uses the Barclays index methodology.

Unrated securities do not necessarily indicate low credit quality.

Other includes non-fixed-income holdings such as equity, alternatives, non-fixed-income investment vehicles, and derivatives.

As of 12/31/20, fund utilized 0.0% gross leverage.

Other Fixed Income includes investment vehicles such as fixed-income closed-end funds, exchange traded funds and mutual funds.

Standard Deviation: A statistical measure of the historical volatility of an investment, usually computed using 36 monthly returns.

Alpha is a measure of the difference between actual returns and its expected performance, given its level of risk as measured by beta. A positive alpha figure indicates the portfolio has performed better than its beta would predict. In contrast, a negative alpha indicates the portfolio has under performed, given the expectations established by beta.

Correlation: A measurement between -1 and 1, which indicates the linear relationship between two variables. If there is no relationship between two variables, the correlation coefficient is 0. If there is a perfect relationship, the correlation is 1. And if there is a perfect inverse relationship, the correlation is -1.

Sharpe Ratio: A risk-adjusted measure developed by William F. Sharpe calculated using standard deviation and excess return to determine reward per unit of risk. The higher the Sharpe Ratio, the better the risk-adjusted performance.