Analysts and traders were jolly about the continued AI trade as others were thinking it's oversold. The bulls were good with AI stocks being in the green but Cisco which reported last night, temporarily broke up its all-time high but then sold off and is now over 6% downU.S. markets are starting Thursday with a slightly more positive tone after softer inflation data helped stocks and lowered Treasury yields. AI stocks remain one of the strongest parts of the market, but traders should still watch today’s U.S. PPI inflation report and the renewed risks coming from oil and geopolitics.What young traders and investors need to know todayU.S. stocks are still being powered by AIThe S&P 500 closed at 7,748.50, up 0.26%, while the Nasdaq gained 0.54% to 26,588.49. The Dow slipped 0.04%.Some AI-related stocks had much bigger moves:CoreWeave: about +19%Super Micro: about +19%Nebius: about +34%Nvidia: about +3%Micron: +4.9%The simple story is that investors are still willing to pay up for companies connected to AI infrastructure, chips, data centers and computing demand.What this means: A rising stock market does not mean every stock is rising equally. Right now, AI-related companies are doing much more of the heavy lifting.Softer inflation is helping stocksU.S. inflation came in slightly cooler than expected.July CPI increased only 0.1% from the previous month, while annual inflation slowed to 3.4% from 3.5%.That matters because the Federal Reserve uses inflation data when deciding whether interest rates need to stay high or move even higher.Markets now see roughly a 40% chance of a September Fed rate hike, down from about 54% one week ago.Why should stock investors care about interest rates?Higher interest rates make borrowing more expensive for companies and consumers. They can also make bonds more attractive compared with stocks.That is especially important for fast-growing technology companies, because investors are often paying today for profits they expect many years into the future.Lower expected rates can therefore support technology and growth stocks.The next inflation test comes today with U.S. producer prices, or PPI.What is PPI? It measures changes in prices received by producers. Traders watch it because higher costs for companies can eventually reach consumers and keep inflation elevated.Treasury yields are moving slightly lowerThe 10-year U.S. Treasury yield is around 4.68%, down slightly from Wednesday.Think of the 10-year yield as one of the most important interest rates in global markets.When Treasury yields rise sharply, stocks can come under pressure because investors suddenly have a more attractive low-risk alternative.When yields fall, growth stocks often get some breathing room.For young investors, this relationship is worth remembering:Higher yields can become a headwind for stocks. Lower yields can become a tailwind, especially for technology shares.The U.S. Dollar Index is near 99.96, while USD/JPY is around 159.33.Gold is taking a break after a strong rallyGold has pulled back slightly, with spot gold near $4,384 per ounce and December futures around $4,441.This looks more like profit-taking after a strong move than a major change in the gold story so far.Gold is still up more than 8% in August.Why has gold been strong?One reason is that lower expectations for additional Fed rate hikes can make gold more attractive. Gold does not pay interest, so when investors expect interest rates to stop rising, holding gold becomes relatively less expensive.Silver is trading around $65.09.Oil is falling, but it remains one of the biggest risks for marketsBrent crude is near $87.95, while WTI is around $82.19.Oil is under pressure because expectations for global demand have weakened and U.S. crude inventories increased sharply.That is bearish for oil prices in the short term.But there is another side to the story.The unresolved U.S.-Iran dispute around the Strait of Hormuz remains an important upside risk.The Strait of Hormuz is one of the most important energy shipping routes in the world. If oil supplies through the region were seriously disrupted, crude prices could rise very quickly.And that would matter far beyond the oil market.Why should stock investors care about oil?Higher oil prices can increase transportation, manufacturing and energy costs across the economy.That can push inflation higher.If inflation rises again, the Fed may have less room to reduce interest rates and could even consider further tightening.So the chain can look like this:Oil rises sharply -> inflation risk rises -> Treasury yields may rise -> Fed expectations become more hawkish -> stocks can come under pressure.That is why oil may be one of the most important macro markets to watch right now.Wheat and food prices are another risk to watchThe war around the Black Sea is also affecting agricultural markets.A Ukrainian strike on Novorossiysk, an important Russian grain-export hub, disrupted operations and helped push grain prices higher.At the same time, attacks and restrictions affecting Ukraine's Black Sea infrastructure have sharply reduced Ukrainian grain exports.This matters even if you never trade wheat.If grain prices remain high, the effects can eventually show up in everyday products such as:BreadPastaBreakfast cerealsAnimal feedMeat and dairy production costsSo when you see wheat futures moving because of Russia or Ukraine, remember that this is not only a trader story. It can eventually become a supermarket story.Cisco shows why good earnings are not always enoughCisco shares fell more than 4% after hours, even though the company reported strong growth and gave a solid revenue outlook.Cisco also said AI infrastructure orders from large cloud customers reached $4 billion during the quarter.So why did the stock fall?Because markets do not only react to whether results are "good."They react to whether results are better or worse than what investors already expected.Cisco had already risen more than 60% this year, so expectations were extremely high.Important investing lessonA company can report good earnings and still see its stock fall.If investors were already expecting amazing numbers, "very good" may not be good enough.The market trades the difference between expectations and reality.Cerebras gives young investors another lesson about AI stocksCerebras shares fell about 16% after hours after quarterly revenue missed expectations.The company actually increased its full-year revenue forecast, but investors were also disappointed by weaker profit margins.This is another example of what can happen when a stock carries a very high valuation.When expectations are low, a company can sometimes rally on an average report.When expectations are extremely high, even a small disappointment can cause a large selloff.What this means: The faster a stock rises and the more excitement investors price into it, the less room there may be for mistakes.That is particularly important right now in AI stocks.The main market setup for todayThe current market picture is relatively supportive for stocks:Inflation has softened.Treasury yields have moved slightly lower.AI spending remains strong.Technology stocks continue to lead.But there are also risks.The S&P 500 is already near record levels, meaning investors have priced in a lot of good news.Today’s PPI inflation report is the next immediate test.And crude oil remains one of the biggest risks outside the stock market.If oil continues falling, that could help the inflation story.If geopolitical tensions suddenly push Brent sharply higher again, inflation fears could return very quickly.For traders and investors, that is the bigger lesson today: do not watch stocks in isolation. Watch inflation, Treasury yields and oil too, because they can change the entire market story. Mostly watch if Cisco stock sustains its post-earnings bearish move and how it affect other chip stocks. The next earnings session now especially matters because it can either confirm a bearish transition or expose this as another fakeout in an unusually high-dispersion earnings season. This article was written by Itai Levitan at investinglive.com.