Abstract: A trading information providing system includes a plurality of node apparatuses managed by different financial institutions, a server apparatus, and a user terminal. Each of the plurality of node apparatuses comprises a storage device configured to hold both trading information of a user in a financial institution that manages the node apparatus and trading information of the user in a financial institution that does not manage the node apparatus. The server apparatus comprises at least one processor or circuit configured to: receive, from the user terminal of the user, a request for the trading information of the user; acquire trading information according to the request from at least one of the plurality of node apparatuses; and transmit a response to the user terminal, the response including the trading information of the user in at least two financial institutions.