Purchasing units of CapitaLand Ascendas REIT (commonly traded under the SGX stock ticker symbol A17U) requires opening a brokerage account that provides direct access to the Singapore Exchange (SGX). International investors can utilize global online trading platforms or specialized domestic brokerages that support international settlements, allowing them to search for the ticker symbol, review live market ask prices, and execute standard equity or unit trust purchase orders during active Singapore trading hours.