Gold keeps trading up to new record high prices . Bitcoin , while struggling to break out above recent record levels above $100,000 , continues to find more mainstream adoption. But both the classic market safe-haven and its more risky new crypto rival are doing something other than just move up and to the right on the chart for investors: within some exchange-traded funds, they are also generating income.

Investors want exposure to alternative assets that do not move in lockstep with stocks and bonds. That comes at a time when stocks are also at record prices, and returns are concentrated in a handful of mega-cap tech stocks that now represents roughly 40% of the S&P 500. Bonds, meanwhile, have traded with greater volatility than their historical role in a classic

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