for those who care about CME's new silver margin scheme.

1. Today CME will change its fixed margin to floating margin system for Precious metal, like gold and silver. 

2. The new margin system will be set as 9% of underline metal ( like gold or slive) future's nominal value.

for example, if the nominal value of your gold future (or silver) is 100 dollar,  you will need to put 9 dollars as collateral.

3. The margin will be "automatically" adjusted on daily basis.

4. CME still reserve the right of "mannual adjustment".

5. CME has several attmepts, trying to rein in silver or gold price. but failed. Now they try to increase the risk of of holding silver or gold future automatically in the silver/gold bull market. 

6. How this will affect your daily risk. For example,  if your silver future contract's nominal value is 100000 us dollar, and today is up. The your higher nominal value*9%=higher margin dollar is your new margin. And you will have either put more dollar as collateral, or pare down your holding to meet the margin requirement.

the risk for you is if silver going up every day and you want hold your position, you will have to put new money every day to meeting the margin requirement. just think about how strong the silver was last 12 month, with the new margin system you would have to put a lot of new margin call (new cash) into your account.

Or you would have to sell on every up day.

However, it silver or gold price were primarily driven by cash buyers. Then the new margin will not work as it is design.

In short, USA want to rein in the silver/gold price. Why? you know it.