Investors looking to boost their passive income in 2026 have come to the right place.Investment management firm Vanguard offers tons of low-cost exchange-traded funds (ETFs) for equities, bonds, asset blends, and more. How each performs is generally tied to the individual equities they follow.Given the overwhelming influence of artificial intelligence (AI) on markets these days, you may expect growth and tech-focused ETFs to have been the undisputed standouts over the last five years. But surprisingly, the ...