The Fed raised its policy rate again at its September meeting, and within an hour the headlines were warning that mortgage costs were about to climb. That is not how mortgage pricing works. The Fed sets a short-term rate that banks charge each other overnight, while the rate on a 30-year home loan is set by investors who buy mortgage bonds. Knowing the difference keeps a buyer from making a major financial decision based on the wrong headline.

Start with what the Fed actually controls. The federal funds rate is an overnight lending rate between banks, and it influences credit cards, home equity lines, and short-term business loans almost immediately. A 30-year fixed mortgage is a long-term instrument, so it is priced off long-term bond yields instead. Those yields reflect what investors expect inflation and economic growth to look like over the next decade, not what the Fed did at its last meeting. The Fed is one voice in that conversation, and often not the loudest one.

That said, the Fed still reaches mortgage rates, just not the way most people assume. Markets price in what they think the Fed will do months from now, so a hike that was widely expected can leave mortgage rates unchanged or even lower if the Fed signals it is close to finished. The reverse happens too: mortgage rates often rise in the weeks before a hike, then sit still on the day of the announcement. The Fed's balance sheet matters as well, because when it lets its mortgage bond holdings shrink, there is less demand for those bonds and the spread between mortgage rates and Treasury yields can widen.

For anyone buying or selling right now, the practical takeaway is to stop waiting for a Fed meeting to change your plans. Payments are what matter, and a payment depends on the price, the down payment, the loan term, and the rate, not on the Fed alone. Buyers who are ready should get pre-approved, understand their monthly ceiling, and ask about seller concessions or a temporary rate buydown rather than trying to guess the bottom. Sellers should price to what today's buyers can actually afford, because overpricing and waiting for a better rate environment usually costs more than adjusting now. If rates do improve later, refinancing is always an option, and it is a much easier decision than timing a purchase.