NEW YORK ( TheStreet ) -- Shares of Brandywine Realty (NYSE: BDN ) were gapping down Thursday morning with an open price 12.3% lower than Wednesday's closing price. The stock closed at $11.38 Wednesday and opened today's trading at $9.98. The average volume for Brandywine has been 1.6 million shares per day over the past 30 days. Brandywine has a market cap of $1.4 billion and is part of the financial sector and real estate industry. Shares are up 21.7% year to date as of the close of trading on Wednesday. Brandywine Realty Trust is a publicly owned real estate investment firm. The firm engages in the engaged in the ownership, management, leasing, acquisition, and development of office and industrial properties. It primarily manages Class-A, suburban and urban office portfolio. TheStreet Ratings rates Brandywine as a hold.