(Bloomberg) -- It sounds like a surefire, slam-dunk trade for stock investors playing defense: ETFs that will bet on equity markets without — the pitch says — going down.Most Read from BloombergTrump Has Only $6.8 Million for Legal Fees With Trial UnderwayTikTok to Remove Executive Tasked With Fending Off US ClaimsRay Dalio’s Famous Trade Is Sputtering and Investors Are BailingUS Dollar’s Extended Reign Delivers Stark Wake-Up Call for MarketsS&P 500 Tops 5,000 as Earnings Kick Into High Gear: Ma