Here we go again. The federal government is barreling toward another shutdown, potentially as soon as this Saturday, barely two months after the longest closure in U.S. history wrapped up in November.

The deadline is January 30, 2026. If Congress can't pass funding legislation by then, parts of the government will go dark. The sticking point this time? Money for the Department of Homeland Security, specifically Immigration and Customs Enforcement.

According to Reuters, Senate Democrats are refusing to provide the votes needed to pass a $64.4 billion DHS spending bill. They want Republicans to strip DHS funding out of a broader package that would also cover defense, health, transportation, education and housing programs through September 30. That broader funding expires after midnight Friday.

Democrats are insisting on separating out DHS funding in the wake of fatal ICE shootings in Minnesota. Their argument is simple: reforms first, money later. Republicans, meanwhile, want the full package passed without changes, warning that carving out DHS could sink the entire bill.

Prediction markets are reflecting just how tense things have gotten. Polymarket currently puts the odds of a government shutdown this Saturday at 79%, a dramatic spike from just 9% last Sunday. What changed? President Donald Trump's comments.

In a CBS interview that aired Sunday, Trump said a shutdown was "probable" if Democrats didn't back down from their demands. Translation: don't expect much compromise before the deadline hits.

With negotiations stalled and both sides digging in, another partial shutdown looks increasingly likely.

What Happened to Markets During the Last Shutdown

The previous shutdown ran from October 1, 2025 to November 13, 2025. During that stretch, the SPDR S&P 500 ETF Trust (SPY) managed to eke out a gain of about 0.5%.

Not exactly a disaster for the broad market, but sector performance told a more interesting story. Healthcare was the clear winner, while real estate, consumer discretionary and communication services lagged badly.

Here's how the major sector ETFs performed:

• Health Care Select Sector SPDR Fund (XLV): +6.46%
• Energy Select Sector SPDR Fund (XLE): +1.28%
• Utilities Select Sector SPDR Fund (XLU): +0.72%
• Technology Select Sector SPDR Fund (XLK): +0.69%
• SPY: +0.54%
• Financials Select Sector SPDR Fund (XLF): -0.77%
• Industrials Select Sector SPDR Fund (XLI): -1.17%
• Consumer Staples Select Sector SPDR Fund (XLP): -1.19%
• Materials Select Sector SPDR Fund (XLB): -1.25%
• Real Estate Select Sector SPDR Fund (XLRE): -3.09%
• Consumer Discretionary Select Sector SPDR Fund (XLY): -3.79%
• Communication Services Select Sector SPDR Fund (XLC): -4.10%

The sector story was mostly muted, but individual stocks? That's where things got painful for some big names.

According to market data, several mega-cap stocks suffered steep declines during that shutdown window. We're talking double-digit drops for some of the market's heavyweights:

• Oracle Corp. (ORCL): -24.7%
• AppLovin Corp. (APP): -21.0%
• Blackstone Inc. (BX): -17.0%
• Novo Nordisk A/S (NVO): -16.9%
• Meta Platforms Inc. (META): -15.0%
• Arista Networks Inc. (ANET): -12.7%
• Automatic Data Processing Inc. (ADP): -12.7%
• Robinhood Markets Inc. (HOOD): -12.7%
• Alibaba Group Holding Ltd. (BABA): -12.6%
• Tesla Inc. (TSLA): -12.5%

Now, it's important to remember that correlation doesn't equal causation. Oracle didn't drop nearly 25% solely because the government shut down. These stocks had their own company-specific issues, earnings reports, and market dynamics at play during that period.

But the timing is worth noting. When uncertainty rises in Washington, markets can get jittery, and individual stocks can see exaggerated moves as investors reassess risk across their portfolios.

As we head into this weekend with shutdown odds approaching 80%, it's a useful reminder that while the broad market might shrug off political dysfunction, individual names can still take a beating. Whether history repeats itself remains to be seen.