Mergers and acquisitions refer to the corporate strategy of buying, selling, and combining companies. There are several types of M&A transactions. A merger occurs when two companies combine to form a single new company, while an acquisition happens when one company purchases another. Mergers and acquisitions can be financed through cash payments, borrowing, issuing bonds, or offering stock in the acquiring company. Accurate business valuations are important for determining the purchase price in an M&A deal.