ETF's are made up of a group of stocks. These can be in a combination of sectors in one ETF or it can be an ETF that focuses on one sector like the financial sector. An ETF can be a made up of 100's or even 1,000's of stocks. In my opinion, if you go after ETF's this year, I would go after 3 sectors. Healthcare, financials, and energy. From experience, I can tell you that in a rising rate environment tech stocks and other growth stocks will suffer while these will thrive. This is not financial advice, it's just my opinion and my experience in the past.