As stocks hit record highs, Wall Street banks are getting an ever increasing number of requests about whether the blast, which has a few equals to the website period, will bring about a comparable bust. 

What's going on: "We are accepting various inquiries [about] whether an air pocket is conceivably framing in monetary business sectors," Mislav Matejka, JPMorgan's head of worldwide and European value procedure, said in a note to customers on Monday. 

In any case, the examination groups at enormous banks are reluctant to sound the caution, highlighting truly low loan fees and the tremendous amounts of money actually being printed by national banks.