(Bloomberg) The latest Nvidia Corp. frenzy is fueling an unprecedented rally in the booming industry of leveraged-up ETFs as retail traders go all-in on the world’s “most important stock.”Most Read from BloombergWorld’s Largest Nuclear Plant Sits Idle While Energy Needs Soar‘Not Gonna Be Pretty:’ Covid-Era Homebuyers Face Huge Rate JumpWarning Signals Are Flashing for Homeowners in Texas and FloridaNew BYD Hybrid Can Drive Non-Stop for More Than 2,000 KilometersWall Street Returns to T+1 Stoc