This ETF's big yield has come at a high cost to investors this year and it could incur more pressure if interest rates fall further.The list of this year's worst-performing exchange-traded funds (ETFs) is predictably littered with inverse and leveraged funds, but when those exotic products are stripped out, there are still some basic approaches on the offenders' list.To the dismay of income-hungry investors, the 100 worst-performing ETFs of 2025, excluding bearish and geared funds, include covered call fund ...