Stock Market Midday, Sept. 28: Stocks Slide as Yields Rise, MongoDB Tumbles

Sep 28, 2026
stock-market-midday,-sept.-28:-stocks-slide-as-yields-rise,-mongodb-tumbles

As of 11:56 AM ET, the S&P 500 (SNPINDEX:^GSPC) is down 0.78% to 7,684, the Nasdaq Composite (NASDAQINDEX:^IXIC) has fallen 0.90% to 26,823, and the Dow Jones Industrial Average (DJINDICES:^DJI) is trading 0.72% lower at 51,465 as geopolitical tensions and rising energy costs weigh on risk appetite.

Gold is down 3.83% to $4,122.91, and the 10-Year Treasury yield is up 8 basis points to 5.26%. Energy and consumer defensive stocks are the biggest gainers, with many sectors in the red. Consumer cyclicals and communication services fell the most.

Today’s biggest moves

Nvidia Corporation is climbing after the chipmaker announced a massive $150 billion share buyback, while MongoDB, Inc. is cratering following the surprise departure of its CEO. President and CEO, Chirantan “CJ” Desai, is moving to Meta Platforms. Chipmakers, including Intel and Advanced Micro Devices, fell on artificial intelligence safety concerns.

What this means for investors

The rejection of a U.S.-Iran truce proposal is weighing on sentiment today, as investors weighed continued disruption to oil supplies. Investors fled to defensive sectors as oil prices surged and hopes of an imminent reopening of the Strait of Hormuz faded again.

Treasury yields continued to rise, setting multi-year highs as geopolitical uncertainty and inflation fears contributed to a bond sell-off. There’s a lot of economic data coming this week, including inflation and jobless figures, which will be key for markets as they evaluate the economy.

Meanwhile, investors are bracing for a major shift in timing as the NYSE, Nasdaq, and the London Stock Exchange expand trading hours. It could fundamentally change liquidity and the way markets work, but there are regulatory and investor-protection risks to consider.

Should you buy stock in S&P 500 Index right now?

Before you buy stock in S&P 500 Index, consider this:

The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and S&P 500 Index wasn’t one of them. The 10 stocks that made the cut are built for long-term growth and could produce monster returns in the coming years.

Consider when Netflix made this list on December 17, 2004… if you invested $1,000 at the time of our recommendation, you’d have $383,680!* Or when Nvidia made this list on April 15, 2005… if you invested $1,000 at the time of our recommendation, you’d have $1,382,954!*

That performance is why people listen. With a track record of beating the S&P 500 by 4x, Stock Advisor offers a distinct advantage. Don’t miss the latest top 10 list, available with Stock Advisor, and join an investing community built for the long haul.

Leave a comment