Five new exchange-traded funds greeted the market in April’s first week, and income once again was the flavor du semaine. Four bond funds came into being, as well as a “fund of funds.”

The Morningstar Multi-Asset Income Index Fund (BZX:IYLD) was one of four funds that BlackRock (NYSE:BLK) brought to market last week on the BATS BZX Exchange, the first listings for the exchange since its disastrously failed IPO.

But rather than holding any particular set of stocks, IYLD holds a number of ETFs across several classes. Fixed-income ETFs make up about 60% of the fund, equity 20% and alternative asset classes (REITs and preferred securities) 20%.

IYLD’s most recent holdings list, according to iShares:

• iBoxx High Yield Corporate Bond Fund (NYSE:HYG), 19.71%
• Barclays 20+ Year Treasury Bond Fund (NYSE:TLT), 15.06%
• Dow Jones Select Dividend Index Fund (NYSE:DVY), 14.97%
• S&P US Preferred Stock Index Fund (NYSE:PFF), 14.91%
• IBoxx Investment Grade Corporate Bond Fund (NYSE:LQD), 10.32%
• iShares JP Morgan USD Emerging Markets Bond Fund (NYSE:EMB), 9.67%
• Barclays 10-20 Year Treasury Bond Fund (NYSE:TLH), 5.02%
• FTSE NAREIT Mortgage Plus Capped Index Fund (NYSE:REM), 4.97%
• iShares S&P Global Infrastructure Index (NYSE:IGF), 4.87%

IYLD’s net expense ratio is 0.6% — that includes 0.25% in management fees, as well as expenses for the ETFs it holds.

BlackRock also launched a few bond funds, including …

Global High Yield Corporate Bond Fund (BZX:GHYG): Tracks an index for high-yield bonds in developed markets, denominated in several currencies including U.S. dollars. U.S. bonds account for 69% of the fund. Expenses are 0.4%.

iShares Global ex-USD High Yield Corporate Bond Fund (BZX:HYXU): Like GHYG, except bonds are denominated in non-U.S. currencies. France, the U.K., Germany and the Netherlands are the best-represented. Expenses are 0.4%.

iShares Emerging Markets High Yield Bond Fund (BZX:EMHY): Tracks an index for high-yield corporate and government bonds denominated in U.S. dollars. Expenses are 0.65%.

Van Eck also launched the Market Vectors International High Yield Bond ETF (NYSE:IHY), which tracks an index for high-yield bonds of international corporations outside the U.S. that are not denominated in U.S. dollars, Canadian dollars, euros or pounds. Despite dealing in noninvestment-grade bonds, most of IHY’s bonds are on the better end of the rating spectrum. Expenses are 0.4%.

All in all, 90 new funds have been launched this year, according to XTF.com. The previous week’s offerings also were bond-heavy, though a commodity ETF also came to market.

Kyle Woodley is the assistant editor of InvestorPlace.com. As of this writing, he did not hold a position in any of the aforementioned securities. Follow him on Twitter at @KyleWoodley.