Last Wednesday’s CPI report was the second hot inflation print in a row. If you’ve been investing for the last three years, the environment you got used to is changing. Here’s what happened, where it’s likely headed, and how to think about it. September CPI came in at 3.7% year over year, above the 3.6% economists expected. Month over month, prices rose 0.6%. Most of that jump is energy. Oil crossed $100 on Friday as fighting around the Strait of Hormuz escalated. But the Fed can’t do anything about oil prices. Raising rates doesn’t make tankers move faster. So the Fed watches core inflation instead, which strips out food and energy. Core CPI rose to 2.6% from 2.4%, also above forecast. That doesn’t sound like much until you look at the recent trend. Over the last three months, core has been running at a 3.4% annualized pace, up from 2% in August. That’s the part that matters. It means expensive energy is leaking into everything else: shipping costs, services, rent. When inflation spreads like that, it gets sticky. Gas prices can fall in a week. Rent and wages don’t. One more number worth knowing: inflation has outpaced wage growth for six straight months. Most people are getting poorer in real terms, even if their paycheck went up. The Fed already raised rates in September, its first hike in over three years, to a range of 3.75% to 4%. The question now is when the next one comes, not if. As of last week, markets were pricing roughly a one-in-three chance of another hike at the October 28 meeting and around 80% for December. A lot of analysts think the Fed waits until December to avoid moving a week before the midterms. If oil stays above $100, the November CPI will likely run hot too, and December gets close to locked in. A stock or bond is worth what it will pay you in the future, discounted back to today. When rates rise, that discount gets bigger, so future money is worth less right now. That hits hardest on assets whose value sits far in the future: long-term bonds and expensive growth stocks, especially ones that need to borrow to grow. Companies with profits today, or that sell something priced off inflation (like energy), hold up better. You saw this play out last week. The Nasdaq had its worst week since June while energy stocks went up. Same market, same news, opposite reactions.