The sector ETFs can see big swings and volatility. “Given its extremely narrow focus, this thematic fund should be treated as a satellite specialty holding to complement a diversified portfolio, albeit one that may be held for several consecutive years,” said Morningstar’s Abraham Bailin in a recent analyst report on Guggenheim Solar ETF.
The solar-energy ETF is up about 15% year to date.
Guggenheim Solar ETF
