Answer:
D. Goldman Sachs
Step-by-step explanation:
Goldman Sachs is a multinational investment bank and financial services company that operates in various financial markets, including investment banking, securities trading, asset management, and other financial services. It is involved in activities such as underwriting new securities, facilitating mergers and acquisitions, trading stocks and bonds, and providing investment advisory services. The other options mentioned, Bank of America and Hartford insurance, are financial institutions but not financial markets. The real estate market, while it involves financial transactions, is not typically considered a financial market but rather a specific sector within the broader economy.