MetaMask provides users with the unique opportunity to hold various tokenized assets, including stocks, exchange-traded funds (ETFs), and commodities, all in a secure manner on the blockchain. However, it's important to clarify that despite this functionality, MetaMask does not function as a traditional brokerage service, as it lacks the regulatory framework and features typically associated with brokerage firms. This distinction is crucial for users to understand the capabilities and limitations of the MetaMask platform in the context of digital asset management.
source: https://blocknews.com/metamask-lets-you-hold-tokenized-stocks-etfs-and-commodities-onchain-but-dont-call-it-a-brokerage/