https://www.youtube.com/watch?v=a_bHb8fc6yk
During Final Jeopardy, Alex Trebeck asked the three contestants, “A 1957 event led to the creation of a national historic site in this city, signed into law by a president whose library is now there too.” Even though all of them were in the positive at the start of the round, they all ended it with a nothing because none of them guessed the correct answer “Little Rock, Ak” and bet all of their earnings.
So what happens on Jeopardy when none of them have any money left? They all go home and three new contestants will be on the next show. Is this the first time this happened? No, but it still fun to watch during the rare occasion when it does happen.