Wall Street sent up a fresh warning flare on Monday. The S&P 500, the broad market benchmark tracked by the SPDR S&P 500 ETF Trust (SPY), slipped and closed below its 100-day moving average. Not just for one day, but for a second session in a row.

Now, if you're not a chart-watcher, that might sound like boring technical jargon. But here's why it gets people's attention: the last time this happened was on February 27, 2025. In the weeks that followed, the S&P 500 proceeded to drop almost 20%, skirting the official line of a bear market. So, when the index breaks below this particular line again, traders understandably get a little nervous. It's like seeing a crack in the same spot on your windshield where it shattered completely last year.

The 100-day moving average is one of those medium-term trend indicators that everyone watches. When prices consistently close below it, it often suggests the market's momentum is shifting from bullish to bearish. Whether this breakdown leads to a repeat of last year's painful slide is the million-dollar question. The macro environment, especially in the energy sector, is doing its best to keep everyone on edge.

Oil's Wild, Wild Ride

Speaking of edge, let's talk about the oil market. Monday was the tenth day since the conflict involving Iran began, and the crucial Strait of Hormuz—the narrow shipping lane that handles about a fifth of the world's seaborne oil—is still blocked. Against this tense backdrop, crude oil decided to put on a show of historic volatility.

West Texas Intermediate crude futures shot up to an overnight high of $119 per barrel. Then, they collapsed, falling below $90 later in the same session. That's a staggering $38 swing from peak to trough. To find a daily trading range that wild, you have to go back to April 2020, when pandemic panic briefly sent oil prices into negative territory. This kind of move is what happens when a market is utterly torn between two opposing forces: sheer terror over a prolonged supply crisis and desperate hope for a quick diplomatic fix.

Policy Levers and Military Optimism

With prices gyrating and consumers feeling the pinch, the White House is reportedly looking at pulling every lever it can find. According to reports, the Trump administration is evaluating a menu of emergency options to try and stabilize fuel costs.

The potential measures are wide-ranging. They're looking at things like restricting U.S. crude oil exports, which is a big deal for energy markets. They're considering direct intervention in oil futures markets. There's talk of waiving federal fuel taxes to give consumers a break at the pump. Another idea on the table is to temporarily lift shipping restrictions under the Jones Act.

That last one is a classic inside-Washington policy tool. The Jones Act requires that goods moved between U.S. ports be carried on ships that are American-built, American-owned, and American-crewed. It's a law that protects the U.S. maritime industry, but in a crisis, it can limit flexibility. Temporarily suspending it could allow foreign-flagged vessels to help move fuel around the country's coastline more easily, potentially easing regional shortages. Reports indicate the White House is growing increasingly worried about the economic fallout from these soaring energy prices.

On the military front, President Donald Trump struck a decidedly different tone—one of optimism. In an interview with CBS News, he said he believes the war is running "very far ahead of schedule" and declared it is now "complete."

"They have no navy, no communications, they've got no air force. Their missiles are down to a scatter," Trump said, offering a blunt assessment of the adversary's capabilities.

So there you have it. The stock market is flashing a technical warning sign that has a nasty recent history. The oil market is experiencing gut-wrenching volatility as a key global chokepoint remains closed. And the response involves a mix of potential emergency economic measures and confident military statements. It's a lot for a Monday.