Signet Jewelers Stock Still Offers Value Despite Strong Rally

The jewelry sector rarely produces star performers, yet Signet Jewelers (NYSE: SIG) has become a rare exception. Over the past year, the stock has delivered a compelling 92% return, with gains continuing into 2026 at around 17% year-to-date. But the real question for investors isn’t whether Signet has already rallied—it’s whether the company still has room to run at current valuations.

Recent earnings paint a picture of a business firing on all cylinders. In the most recent quarter ending November 1, Signet delivered results that shattered market expectations, with adjusted earnings surging approximately 162% compared to the prior year period. Same-store sales and net sales both grew 3% year-over-year, signaling consistent momentum across the retailer’s sprawling portfolio. The company operates roughly 2,600 retail locations globally, spanning well-known brands like Zales, Kay Jewelers, and Jared in physical locations, plus online players such as Blue Nile and Diamonds Direct.

Why Signet Is Outperforming The Jewelry Market

What’s driving this outperformance? Much of the story centers on changing consumer preferences and evolving business economics. The shift toward lab-grown diamonds (LGDs) has become the primary growth engine for Signet. These synthetic stones now account for 15% of fashion jewelry sales—double the share from a year earlier—and represent roughly 40% of bridal collections.

The LGD advantage is both straightforward and powerful. These diamonds carry lower production costs while remaining highly accessible to consumers at attractive price points. Jewelers can still achieve significant markups over wholesale costs, creating a more profitable sales channel. Additionally, LGDs allow retailers like Signet to maintain better control over inventory levels and supply chain dynamics—a meaningful operational improvement in a traditionally inventory-heavy business.

The margin expansion reflects this shift clearly. Signet’s gross margin expanded by 130 basis points in the recent quarter, reaching 37.3%, demonstrating how business-model changes translate directly to the bottom line.

Lab-Grown Diamonds: The Engine Driving Signet’s Growth

The jewelry industry itself remains a structural growth story. Industry analysts project that jewelry sales will expand at a 4% to 5% annual rate through 2028, outpacing growth in apparel and accessories. More significantly, lab-grown diamonds are expected to expand at a 15% to 16% annual clip within that timeframe—more than tripling the broader jewelry growth rate.

This isn’t merely a cyclical uptick. The adoption of LGDs reflects genuine demographic and cultural shifts among younger consumers who view lab-grown stones as both environmentally conscious and economically rational. For a dominant player like Signet, which controls one of the industry’s largest footprints, this trend becomes a structural tailwind rather than a temporary boost.

The Case For Signet: Valuation Meets Momentum

The investment thesis rests on a straightforward observation: Signet remains remarkably cheap. The stock trades at just 9 times forward earnings—a valuation that appears disconnected from both its recent momentum and its forward growth prospects. Wall Street consensus projects approximately 13% earnings-per-share growth for the coming fiscal year, with revenue expected to expand roughly 1%.

Even with the stock’s substantial appreciation, this valuation gap suggests additional upside potential exists. The combination of accelerating LGD penetration, margin expansion, and modest revenue growth could drive continued earnings surprises—particularly as consumer spending on jewelry continues to prove resilient.

Valentine’s Day traditionally serves as the jewelry industry’s key retail event, and early 2026 spending patterns suggest the sector remains robust. As earnings reports accumulate through the spring season, Signet’s operational momentum should become increasingly evident to broader market participants who may have missed the initial rally.

For investors evaluating whether Signet has already run too far, the evidence suggests the stock’s attractive valuation and secular growth tailwinds may still be underappreciated. The combination of dominant market position, favorable industry dynamics, and attractive entry point remains compelling.