Yeah thats true, but its also true for silver too so its not a gold specific thing. Actually you need to be careful of changes in overnight maintenance margin requirements for all futures products to be honest. CME changes margin requirements on their products all the time, on a whim. Actually they recently decreased the margin requirement for gold & silver, so my expectation will be they will increase it again in the future perhaps.
Then again, this is true for ALL products, not just futures. Your broker can change margin requirements for anything on a whim overnight too. Your stock can go from 50% margin to 100%, and they tell you maybe a day or two ahead of time if they are nice. And then all of a sudden you have like a day to be margin compliant by the deadline, which means massive deleveraging if over leveraged and taking a loss perhaps on some positions.
All of these execution related and portfolio managing stuff comes with the territory though. My mentality is anytime you are betting on the market, you are on borrowed time, and skating on thin ice on someone's good terms. Terms can change, such as margin requirements, or borrowing rates, and then you are at risk of not being able to sustain a certain position you hold. This all goes back to risk management. You have to account for these things sometimes too. In other words, be careful when over-leveraging. Anything can happen. Play at your own peril and you accept the risks.
Then again, this is true for ALL products, not just futures. Your broker can change margin requirements for anything on a whim overnight too. Your stock can go from 50% margin to 100%, and they tell you maybe a day or two ahead of time if they are nice. And then all of a sudden you have like a day to be margin compliant by the deadline, which means massive deleveraging if over leveraged and taking a loss perhaps on some positions.
All of these execution related and portfolio managing stuff comes with the territory though. My mentality is anytime you are betting on the market, you are on borrowed time, and skating on thin ice on someone's good terms. Terms can change, such as margin requirements, or borrowing rates, and then you are at risk of not being able to sustain a certain position you hold. This all goes back to risk management. You have to account for these things sometimes too. In other words, be careful when over-leveraging. Anything can happen. Play at your own peril and you accept the risks.