Popular funds that sell options for income may be moderating the recent bout of volatility in U.S. stocks, extending the calming effect they have had on the market for the last several months. Assets under derivative income ETFs, funds that use a mix of stock and stock derivatives to generate income, have grown to about $71 billion from $33 billion at the end of 2022, according to Morningstar data. Some options mavens believe these funds and other options-selling strategies have tempered stock gyrations, another reason equity markets have enjoyed a long period of calm.