Opendoor Technologies Inc (OPEN) surged 15.09% in post-market trading on Thursday, driven by bullish sentiment in mortgage-related stocks following former President Donald Trump's announcement of a $200 billion mortgage bond purchase plan.

Trump pledged to direct representatives to buy $200 billion in mortgage bonds using funds from Fannie Mae and Freddie Mac, aiming to lower mortgage rates and housing costs. He criticized the Biden administration for undermining housing affordability and emphasized the initiative would "restore" the market. Opendoor, a digital real estate platform, benefited from the broader sector rally.

The announcement sparked a rally across mortgage-linked stocks, with loanDepot rising 21% and Rocket Companies gaining 8%. Trump framed the move as a corrective measure to address "destroyed" affordability under current policies.