O que aconteceu em Wall Street quando Bud foi convidado a cobrir a perda de seu cliente?

Neste filme, Wall Street , Bud Fox estava conversando com seu cliente, algo como:

BUD: You are a gentleman, sure it is going down a bit, but

UNKNOWN CLIENT: give it back (not very audible)

BUD: give it to whom? you own it

BUD'S BOSS shows up standing in front of him

BUD: no, my boss is not here right now

BUD'S BOSS wants the phone to talk to this client

BUD'S BOSS: this is the sale's manager, what seems to be the problem?

UNKNOWN CLIENT: I want him to pull my account (not very audible)

BUD'S BOSS: I will discuss with the account executive.

BUD'S BOSS gives the phone back to BUD

BUD'S BOSS: I am closing the account, if he does not pay, you pay.

BUD: Mr. Lynch, I swear to you, he is lying.

BUD'S BOSS: I gave you one of the rich men's accounts, you tell me he is gonna DK for a lousy 1/4 point?

BUD: I do not think it is fair, you assigned me this guy, you know he has got a history of ...

BUD'S BOSS: somebody is gonna pay, it ain't to be me.

Qual é exatamente o problema? Sem muito conhecimento de fundo, eu não entendo essa cena.