A meltdown at Situational Awareness, an A.I.-focused investment firm, is raising tough questions about the Wall Street banks that lent billions to the upstart firm.

© Nicholas Albrecht for The New York Times

A meltdown at Situational Awareness, an A.I.-focused investment firm, is raising tough questions about the Wall Street banks that lent billions to the upstart firm.

© Nicholas Albrecht for The New York Times