Readers weigh in on the mini-Berkshires, small-cap risks, the virtues of Elon Musk, and DOGE’s public disservice.

Warren Buffett’s company, Berkshire Hathaway, recently made some interesting moves in its lesser-known investment portfolio. This “secret” portfolio, managed by New England Asset Management ...

The ETF, which finished Wednesday at $19.15, is one of many that use the sale, or writing, of call options to augment income.