Here are some new investments that those saving for or living in retirement might consider for their portfolios, including equity funds designed to assess the environmental and social effects of their investments, explains Robert Powell, a leading expert on retirement investing and editor of TheStreet.com's Retirement Daily.

Fidelity Investments has launched two factor ETFs: Fidelity Low Duration Bond Factor ETF (FLDR) and Fidelity High Yield Factor ETF (FDHY).

The Fidelity High Yield Factor ETF seeks to provide a high level of income and may also seek capital appreciation by normally investing at least 80% of its assets in debt securities rated below investment grade.

In buying and selling securities, the fund uses a proprietary multifactor quantitative model to systematically screen over 1,000 bonds and select those with strong return potential and low probability of default using a value and quality factor-based methodology.

The fund uses the ICE BofA ML BB-B US High Yield Constrained Index as a guide in structuring the fund and selecting its investments as it relates to credit quality distribution and risk characteristics. The fund also employs active security selection to optimize trading and reduce transaction costs.

The Fidelity Low Duration Bond Factor ETF will seek to provide investment returns that correspond, before fees and expenses, generally, to the performance of the Fidelity Low Duration Investment Grade Factor Index. The fund will normally invest at least 80% of its assets in securities included in the index.

The Fidelity Low Duration Investment Grade Factor Index, which comprises U.S. investment grade floating rate notes with less than 5-year maturities and U.S. Treasury notes with 7- to 10-year maturities, is designed to optimize the balance of interest rate risk and credit risk, such that both returns and risk measures may be improved relative to traditional U.S. investment grade floating rate note indices.

Amplify Investments has launched the Amplify EASI Tactical Growth ETF (EASI). EASI seeks investment results that generally correspond to the price and yield of the EASI Tactical Growth Index.

That Index uses a rules-based methodology designed to optimize risk-adjusted returns by tactically rotating between exposure to growth stocks (in periods of upward momentum), and fixed-income securities (seeking lower volatility during periods of momentum loss).

Goldman Sachs has launched the Goldman Sachs JUST US Large Cap Equity ETF (JUST). That fund seeks to provide broad exposure to U.S. large-cap equities, with a focus on companies that demonstrate just business behavior as measured by JUST Capital. The fund seeks to track the JUST U.S. Large Cap Diversified Index, which is constructed by JUST Capital.

Six equity funds from BlackRock will assess the environmental and social effects of their investments, with stock selection driven by machine learning and big data.

BlackRock's systematic active equity team will manage the BlackRock Advantage World Equity Fund, the BlackRock Advantage US Equity Fund, the BlackRock Advantage Europe ex UK Equity Fund, the BlackRock Advantage Europe Equity Fund, the BlackRock Advantage Emerging Markets Fund and the BlackRock Asia ex-Japan Equity Fund.

Adviser BlackRock's iShares has launched the iShares Gold Strategy ETF (IAUF) seeks to provide exposure, on a total return basis, to the price performance of gold and anticipates a close correlation with the Bloomberg Composite Gold Index.

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