JPMorgan CEO Jamie Dimon warned that high levels of leverage across financial markets have the potential of causing disruption in the markets in the future. Speaking to CNBC's Leslie Picker, Dimon said "margin debt is the highest it has ever been." "There's a lot of margin debt you don't see because it's not called margin debt. Dimon went on to say that such leverage can lead fewer investors to cause broader volatility in the market . The remarks came after the collapse of Leopold Aschenbrenner's Situational Awareness fund last week.