NEPRIM assets (niAssets), such as nYUSD and for example nBTC, feature a constant sum market maker, where users can mint and redeem the underlying basket assets (sbAssets) on a 1:1 basis. The 1:1 swap feature has many benefits, such as zero slippage. However, some problems have been identified. For example, the most expensive sbAsset is always drained out of the basket, and the cheapest one always fills it up. To remedy this (as well as to cap system risk), we enforce weight limits, which prevent users from increasing the weight of any sbAsset above its maximum proportional representation.