What happens when you ask the hottest AI tool in the world to design an ETF that can beat the US equity market? It tells you the same thing every frustrated stock manager does.

Investors trying to gauge the strength of the risk-on shift that gripped markets Thursday should look no further than two of the biggest high-yield credit exchange-traded funds.

Amid the deluge of headlines in the past few days about congressional proposals to boost taxes on companies and the wealthy is one that would affect regular investors -- and potentially alter the entire U.S. fund landscape.