Ones making margin calls, for short?

EDS

Think of the Wall Street pros who might demand extra cash when trades go south.

This clue plays on Wall Street slang where "EDs" is short for "equity dealers," the traders who often handle margin calls when investors need to cover losses. The "for short" hint signals it’s an abbreviation, and "making margin calls" points to their role in enforcing brokerage rules. It’s a clever way to turn a finance term into a snappy crossword answer.