Nvidia Corporation, the dominant player in the AI chip market, has witnessed a surprising decline in its stock price despite reporting record-breaking revenues and an optimistic outlook for the future. The company's shares fell by 6% in after-hours trading on Wednesday, and continued to slide by 2% in early Thursday trading, despite impressive earnings and a positive forecast for the upcoming quarter.

Nvidia's fiscal second-quarter report revealed revenue of $30 billion, a staggering 122% increase compared to the same period last year. This growth exceeded analyst expectations, which had forecast $28.7 billion. Additionally, adjusted earnings per share (EPS) of $0.68 surpassed predictions of $0.64. Earnings for the quarter rose by 168% year-over-year, underscoring the company's pivotal role in the burgeoning AI sector.

However, the enthusiasm surrounding Nvidia's financial performance was tempered by concerns about the sustainability of its growth. "It's less about just beating estimates now," noted Matt Britzman, senior equity analyst at Hargreaves Lansdown. "Markets expect them to be shattered and it's the scale of the beat today that looks to have disappointed a touch."

The downturn in Nvidia's stock price, despite the robust figures, reflects growing skepticism among investors about the company's ability to maintain its extraordinary growth rate. Analysts, including Simon French from Panmure Liberum, have observed that the rate of growth is beginning to decelerate. French remarked, "If you're going to raise expectations that high then you've got to keep growing at spectacular rates."

Nvidia's data center segment was a major contributor to the record revenue, generating $26.3 billion, well above the anticipated $25 billion. The company's CEO, Jensen Huang, highlighted the anticipation for Nvidia's next-generation Blackwell chip, which is set to begin production in the fourth quarter and ramp up through fiscal 2026. "Generative AI will revolutionize every industry," Huang stated, underlining the company's commitment to driving innovation in AI technology.

Despite these positive indicators, Nvidia faces challenges that may affect investor confidence. Production delays of the Blackwell chip have raised concerns. Nvidia's CFO, Colette Kress, confirmed adjustments to the Blackwell GPU mask to improve production yields. However, these delays, coupled with a more cautious market outlook, may have contributed to the stock's decline.

The company has also announced a significant $50 billion increase in its share buyback program, aiming to bolster shareholder value amid the volatile market conditions. This move comes as Nvidia seeks to navigate a competitive landscape with emerging rivals like AMD making strategic acquisitions to enhance their AI capabilities.

Nvidia's gaming division, traditionally a major revenue driver, saw a modest 16% increase in revenue to $2.8 billion. While this segment remains strong, it has been overshadowed by the dramatic growth in the data center business, which has become the core of Nvidia's AI-driven success.

The company's dominance in AI chip design and its extensive partnerships with tech giants such as Microsoft, Amazon, Google, and Meta position it well within the industry. However, analysts caution that the rapid expansion of competitors and production challenges could pose risks to Nvidia's market leadership.

Ruben Roy, managing director at Stifel, pointed out that despite emerging competition, Nvidia remains well-positioned to benefit from ongoing infrastructure spending. "When you look at the overall infrastructure spend cycle ... Nvidia appears to us as the best positioned to benefit from that spending," Roy told Yahoo Finance.