Derivative income ETFs, built around covered call strategies, have surged in popularity as investors seek higher yields. These funds generate income by selling call options on stocks or indexes, with the trade-off being limited upside potential during strong market rallies. 

Yields can vary widely depending on how aggressively options are written, with higher payouts often signaling greater risk. The largest products in this space track benchmarks like the S&P 500 and Nasdaq, though smaller providers have introduced sector and single-stock versions. 

While income potential is attractive, investors should weigh opportunity cost, since these strategies often trail the broader market over time. 

Finsum: With interest rates likely to fall, option premiums, and thus fund income, may decline, but yields remain compelling compared to traditional dividend ETFs.