No, there is no minimum hold period. You can sell any precious metal you have previously bought as soon as it has settled.
However, a storage fee will be charged in arrears on the first day of the following calendar month, referred to as the "charge date." This fee, which equates to 0.0417% per month or an annual equivalent of 0.5%, will be calculated based on the prevailing market value as of the charge date. It will be determined from the average daily weight of the precious metals held by you during the preceding month.
Please be aware that the minimum charge for the storage fee is S$0.01, in adherence to the minimum legal tender requirement.