online brokerage
US /ˈɑːn.laɪn ˈbroʊ.kər.ɪdʒ/
UK /ˈɑːn.laɪn ˈbroʊ.kər.ɪdʒ/

1.
a company that allows customers to buy and sell stocks, bonds, and other investments through an internet-based platform rather than through a traditional broker
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Many investors prefer using an online brokerage for its lower fees and convenience.
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Opening an account with an online brokerage is usually a quick process.