'The total return on a portfolio of investments takes into account not only the capital appreciation on the portfolio, but also the income received on the portfolio. The income typically consists of interest, dividends, and securities lending fees. This contrasts with the price return, which takes into account only the capital gain on an investment.'

Which means for our asset as example:- The total return, or performance over 5 years of iShares Core U.S. Aggregate Bond ETF is 6%, which is smaller, thus worse compared to the benchmark SPY (81.9%) in the same period.
- During the last 3 years, the total return, or increase in value is 0.4%, which is smaller, thus worse than the value of 46.1% from the benchmark.

'The compound annual growth rate (CAGR) is a useful measure of growth over multiple time periods. It can be thought of as the growth rate that gets you from the initial investment value to the ending investment value if you assume that the investment has been compounding over the time period.'

Applying this definition to our asset in some examples:- Compared with the benchmark SPY (12.7%) in the period of the last 5 years, the compounded annual growth rate (CAGR) of 1.2% of iShares Core U.S. Aggregate Bond ETF is lower, thus worse.
- During the last 3 years, the compounded annual growth rate (CAGR) is 0.1%, which is lower, thus worse than the value of 13.5% from the benchmark.

'Volatility is a statistical measure of the dispersion of returns for a given security or market index. Volatility can either be measured by using the standard deviation or variance between returns from that same security or market index. Commonly, the higher the volatility, the riskier the security. In the securities markets, volatility is often associated with big swings in either direction. For example, when the stock market rises and falls more than one percent over a sustained period of time, it is called a 'volatile' market.'

Using this definition on our asset we see for example:- Compared with the benchmark SPY (19.8%) in the period of the last 5 years, the volatility of 5% of iShares Core U.S. Aggregate Bond ETF is lower, thus better.
- Compared with SPY (23%) in the period of the last 3 years, the volatility of 6% is lower, thus better.

'Risk measures typically quantify the downside risk, whereas the standard deviation (an example of a deviation risk measure) measures both the upside and downside risk. Specifically, downside risk in our definition is the semi-deviation, that is the standard deviation of all negative returns.'

Applying this definition to our asset in some examples:- Compared with the benchmark SPY (14.5%) in the period of the last 5 years, the downside deviation of 3.8% of iShares Core U.S. Aggregate Bond ETF is smaller, thus better.
- During the last 3 years, the downside deviation is 4.8%, which is lower, thus better than the value of 16.8% from the benchmark.

'The Sharpe ratio (also known as the Sharpe index, the Sharpe measure, and the reward-to-variability ratio) is a way to examine the performance of an investment by adjusting for its risk. The ratio measures the excess return (or risk premium) per unit of deviation in an investment asset or a trading strategy, typically referred to as risk, named after William F. Sharpe.'

Using this definition on our asset we see for example:- Compared with the benchmark SPY (0.52) in the period of the last 5 years, the risk / return profile (Sharpe) of -0.27 of iShares Core U.S. Aggregate Bond ETF is smaller, thus worse.
- Compared with SPY (0.48) in the period of the last 3 years, the ratio of return and volatility (Sharpe) of -0.39 is lower, thus worse.

'The Sortino ratio, a variation of the Sharpe ratio only factors in the downside, or negative volatility, rather than the total volatility used in calculating the Sharpe ratio. The theory behind the Sortino variation is that upside volatility is a plus for the investment, and it, therefore, should not be included in the risk calculation. Therefore, the Sortino ratio takes upside volatility out of the equation and uses only the downside standard deviation in its calculation instead of the total standard deviation that is used in calculating the Sharpe ratio.'

Using this definition on our asset we see for example:- The excess return divided by the downside deviation over 5 years of iShares Core U.S. Aggregate Bond ETF is -0.35, which is smaller, thus worse compared to the benchmark SPY (0.7) in the same period.
- Looking at downside risk / excess return profile in of -0.5 in the period of the last 3 years, we see it is relatively lower, thus worse in comparison to SPY (0.65).

'The ulcer index is a stock market risk measure or technical analysis indicator devised by Peter Martin in 1987, and published by him and Byron McCann in their 1989 book The Investors Guide to Fidelity Funds. It's designed as a measure of volatility, but only volatility in the downward direction, i.e. the amount of drawdown or retracement occurring over a period. Other volatility measures like standard deviation treat up and down movement equally, but a trader doesn't mind upward movement, it's the downside that causes stress and stomach ulcers that the index's name suggests.'

Which means for our asset as example:- Compared with the benchmark SPY (6.08 ) in the period of the last 5 years, the Ulcer Ratio of 2.66 of iShares Core U.S. Aggregate Bond ETF is smaller, thus better.
- During the last 3 years, the Ulcer Ratio is 3.16 , which is lower, thus better than the value of 6.77 from the benchmark.

'Maximum drawdown measures the loss in any losing period during a fund’s investment record. It is defined as the percent retrenchment from a fund’s peak value to the fund’s valley value. The drawdown is in effect from the time the fund’s retrenchment begins until a new fund high is reached. The maximum drawdown encompasses both the period from the fund’s peak to the fund’s valley (length), and the time from the fund’s valley to a new fund high (recovery). It measures the largest percentage drawdown that has occurred in any fund’s data record.'

Using this definition on our asset we see for example:- Looking at the maximum reduction from previous high of -12.4 days in the last 5 years of iShares Core U.S. Aggregate Bond ETF, we see it is relatively greater, thus better in comparison to the benchmark SPY (-33.7 days)
- Looking at maximum reduction from previous high in of -12.4 days in the period of the last 3 years, we see it is relatively larger, thus better in comparison to SPY (-33.7 days).

'The Drawdown Duration is the length of any peak to peak period, or the time between new equity highs. The Max Drawdown Duration is the worst (the maximum/longest) amount of time an investment has seen between peaks (equity highs). Many assume Max DD Duration is the length of time between new highs during which the Max DD (magnitude) occurred. But that isn’t always the case. The Max DD duration is the longest time between peaks, period. So it could be the time when the program also had its biggest peak to valley loss (and usually is, because the program needs a long time to recover from the largest loss), but it doesn’t have to be'

Using this definition on our asset we see for example:- Compared with the benchmark SPY (139 days) in the period of the last 5 years, the maximum days under water of 449 days of iShares Core U.S. Aggregate Bond ETF is larger, thus worse.
- Compared with SPY (119 days) in the period of the last 3 years, the maximum time in days below previous high water mark of 449 days is greater, thus worse.

'The Average Drawdown Duration is an extension of the Maximum Drawdown. However, this metric does not explain the drawdown in dollars or percentages, rather in days, weeks, or months. The Avg Drawdown Duration is the average amount of time an investment has seen between peaks (equity highs), or in other terms the average of time under water of all drawdowns. So in contrast to the Maximum duration it does not measure only one drawdown event but calculates the average of all.'

Using this definition on our asset we see for example:- The average time in days below previous high water mark over 5 years of iShares Core U.S. Aggregate Bond ETF is 142 days, which is greater, thus worse compared to the benchmark SPY (35 days) in the same period.
- Looking at average time in days below previous high water mark in of 155 days in the period of the last 3 years, we see it is relatively larger, thus worse in comparison to SPY (27 days).

Historical returns have been extended using synthetic data.
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- Note that yearly returns do not equal the sum of monthly returns due to compounding.
- Performance results of iShares Core U.S. Aggregate Bond ETF are hypothetical, do not account for slippage, fees or taxes, and are based on backtesting, which has many inherent limitations, some of which are described in our Terms of Use.