Hello, Michael
It is not uncommon for new traders to lose an entire account (sometimes several entire accounts), due to one or more of the deadly mistakes that newbies are prone to make.
It is VERY rare, even for newbies, to lose MORE than an entire account, and end up owing the broker money. But, it’s [B]possible[/B].
So, brokers cover themselves by warning you that it’s possible.
Here is one possible scenario. You hold a position over the weekend. On Friday evening, your broker closes for the weekend, and does not re-open until Sunday afternoon. During this time, the broker’s servers will not execute pending orders. On Saturday, some catastophe (natural disaster, assassination, terrorist attack, etc.) sends the markets reeling. Price overruns your stop-loss, which is NOT executed. On Sunday, when your broker re-opens, and his servers come back on line, your stop-loss is executed, generating a loss larger than your entire account. You now owe your broker some money.
So, before bad things happen, what should you do? Well, as part of your DUE DILIGENCE, you should learn what your broker’s policies are regarding (1) initial margin, (2) maintenance margin, and (3) margin calls. Furthermore, you should inquire, by email or live chat, about terms and conditions which confuse you, or concern you. This thing about losing more than your account obviously concerns you; so, have a talk with this broker, and get him to tell you what scenarios might put you in that position.
Due diligence is your responsibility. Nobody can do it for you. After you have done your due diligence thoroughly, you will find that the CONTRACT your broker requires you to sign is totally one-sided. Surprise, surprise! That thing was written by your broker’s lawyers to protect the broker, not you. You can do the most careful due diligence in the world, and you’ll still have to hold your nose when you sign that contract.
Some brokers require you start the account-opening process, before you get to see the Terms and Conditions you’re going to have to agree to. Other brokers post it all on their websites. You not only have a [B]right[/B] to all of this information up front, but, due diligence means that you have an [B]obligation to yourself[/B] to get all of this information up front.
Be proactive. Demand the answers you need.