Yes, BROKERAGES is a Scrabble word!

Letter values in Scrabble US: B 3, R 1, O 1, K 5, E 1, R 1, A 1, G 2, E 1, S 1.

Is it a valid word?

BROKERAGES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a stock broker's business; charges a fee to act as intermediary between buyer and seller
the business of a broker; charges a fee to arrange a contract between two parties
place where a broker conducts his business

Also: brokerage firm, securities firm, brokerage house.