Medical Properties Trust (NYSE: MPW), a Birmingham, AL-based self-advised real estate investment trust, acquired a portfolio of nine acute care hospitals located throughout greater Boston from Steward Health Care System in a sale leaseback for $1.25 billion, or about $660 per square foot.

The transaction includes $1.2 billion for the real estate as well as a $50 million equity interest in Steward, which will lease back the properties for $600 million…