U.S. stock index futures showed modest gains Tuesday evening following a tumultuous day on Wall Street, where heightened geopolitical tensions over Greenland led to significant losses. The market was spooked by President Donald Trump's demands for Greenland, sparking fears of potential trade tariffs that could escalate into a broader conflict. This geopolitical uncertainty added to existing market volatility, with major indexes experiencing their worst session in three months.

The S&P 500 fell 2.1%, while the Nasdaq and Dow Jones Industrial Average dropped 2.4% and 1.8% respectively. Trump's unexpected focus on Greenland, coupled with his threat of tariffs against European countries, has left investors wary of further economic instability. This comes at a critical time as the market is already grappling with mixed corporate earnings and a complex global economic environment.

Amid these developments, Netflix's earnings report also contributed to market jitters. Despite beating market expectations for the December quarter, Netflix's first-quarter guidance missed, leading to a 4.8% drop in its stock. This underscores growing concerns about the company's ability to maintain subscriber growth and content demand. As the earnings season continues, with key reports from Johnson & Johnson, Charles Schwab, and Prologis due Wednesday, investors will be closely watching for further signs of market stress.

Looking ahead, the market will be closely monitoring Trump's upcoming appearances at the World Economic Forum in Davos, where he is expected to meet with European leaders. The potential for further escalation in the Greenland dispute, coupled with ongoing geopolitical tensions, could continue to impact market sentiment. Investors are bracing for more volatility as these developments unfold, with a focus on how global economic policies might shift in response to these geopolitical pressures.