The CMEGroup announced that as of the close of trading this Friday, margin requirements are yet again going up in silver.
For speculators, initial margin is increased to $14,513 per full sized silver contract, up from this week's earlier hike to $12,825.
Maintenance margin is moving up to $10,750 from $9,500.
Hedgers margin and maintenance is rising to $10,750 and $9,500 respectively. (Source)