For users with assets on multiple blockchains, the total portfolio valuation must accurately sum values across all networks. This test involves holding assets on several different networks and verifying that the total portfolio value displayed is the correct sum of all assets converted to the selected fiat currency. The valuation should use consistent exchange rates across networks and update in near real-time as prices change. This accurate cross-chain valuation is crucial for users to understand their complete financial picture at a glance. The aggregation of value across multiple chains is a complex calculation that must be precise to maintain user trust. The methodology for portfolio valuation is explained in help articles at metamask. The test is successful if the total portfolio value is accurate and updates correctly across all held networks.