The Nuremberg native brings over three decades of capital markets experience, backed by a career shaped by deep market insight and a genuine passion for investing. His journey began in 1994 through an investment club among colleagues – a formative experience that sparked a lifelong dedication to identifying compelling investment opportunities.
Following senior editorial roles at Nürnberger Nachrichten, €uro am Sonntag, and €uro, he went on to serve as Editor-in-Chief of the renowned investor magazine Börse Online from 2014, where he played a key role in shaping high-quality financial journalism for a broad investor audience.
Since April 2026, he has been operating independently, fully focused on his core strength: uncovering mispriced equities with significant upside potential – particularly within the small- and mid-cap segment, where inefficiencies create attractive opportunities for discerning investors.
Throughout his career, he has engaged with some of the most influential minds in global finance, including Warren Buffett, Charlie Munger, Jim Rogers, and George Soros. The unique insights gained from these conversations continue to inform his analytical perspective today. As a dedicated value investor, he is committed to translating complex market dynamics into clear, actionable ideas – empowering investors to make better-informed decisions.
Commented by Jens Castner
Commented by Jens Castner on May 5th, 2026 | 07:25 CEST
SILVER VIPER MINERALS, VIZSLA SILVER, AND DISCOVERY SILVER: THREE STALLION COMPANIES FROM THE STABLE OF CANADA'S SUPER INVESTOR ERIC SPROTT
One of the world's most renowned precious metals experts is betting on three companies that could hardly be more different: an up-and-coming junior explorer, a silver producer on the verge of starting production, and an already profitable heavyweight with a billion-dollar valuation. What do the stocks of Silver Viper Minerals, Vizsla Silver, and Discovery Silver have in common? Exceptional resources, Canadian roots—and superinvestor Eric Sprott himself. A look behind his treasure map.
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Commented by Jens Castner on May 1st, 2026 | 07:10 CEST
RE ROYALTIES, M&G, AND EDEL UNDER THE MICROSCOPE: THREE DIVIDEND GEMS OFF THE BEATEN PATH
The headlines regarding the German coalition government's pension policy offer little cause for optimism: Whether pension levels will decline in the future or, according to the official line, rise more slowly, confidence in the statutory pension system is waning. In an environment where the traditional retirement pension can barely maintain the accustomed standard of living, one strategy is increasingly coming into focus for private investors: building passive income. Dividend stocks have established themselves as a "second salary" in this regard. This speaks in favour of companies like Edel, RE Royalties, and M&G. So far, hardly anyone has them on their radar, but they are definitely worth a look.
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Commented by Jens Castner on April 30th, 2026 | 06:50 CEST
DEFENSE, RAW MATERIALS, RETURNS: POWER METALLIC MINES, ERAMET, AND NICKEL INDUSTRIES FACE A STRESS TEST
While gold and silver have lost significant ground following their price surge at the start of the year, other precious metals are attracting investors' attention. Leading the way is nickel, an indispensable raw material for the defence industry. The price per ton has just climbed to a new multi-year high above USD 19,000. We take a look at what this means for the shares of Power Metallic Mines, Eramet, and Nickel Industries.
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Commented by Jens Castner on April 29th, 2026 | 07:35 CEST
DRONE STRATEGY: AEROVIRONMENT, VOLATUS AEROSPACE, OR DRONESHIELD – WHICH ONE WILL TAKE OFF AGAIN?
The stock market has not failed to notice that drones play a key role in modern warfare. At one point, anything related to unmanned aviation was being snapped up as if there were no tomorrow. But since fall 2025, the high-flying days are over. Even good news barely moves stock prices anymore—a consequence of high valuations. Will stocks like AeroVironment, Volatus Aerospace, and DroneShield take off again? And, if so, does it make more sense to invest in companies that manufacture drones, or in those that shoot them down?
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Commented by Jens Castner on April 28th, 2026 | 11:00 CEST
WOMEN POWER IN THE GOLD HOTSPOT: THE SUCCESS FORMULA OF NEWMONT, LAHONTAN GOLD, AND PARAMOUNT GOLD NEVADA
It was a seismic shift that resonated far beyond Wall Street and deep into the shafts of the global mining industry: when Natascha Viljoen took the helm at Newmont, the world's largest gold mining company, earlier this year, it was far more than just a leadership change. It marked a definitive signal that the era of the "Old Boys Club" in mining is coming to an end. Away from the major headlines, this transformation is also unfolding elsewhere—particularly in the gold hotspot of Nevada. There, companies like Lahontan Gold and Paramount Gold Nevada are demonstrating that female leadership and expertise are increasingly setting the benchmark for the next generation of mining operations. Together, these three companies—from global heavyweight to specialized explorer—impressively demonstrate that in the 21st century, women's leadership has become a key economic factor in what was once a male-dominated field.
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Commented by Jens Castner on April 27th, 2026 | 07:30 CEST
TOXIC WASTE, NUCLEAR WASTE, METHANE: HOW CLEAN HARBORS, STUDSVIK, AND ZEFIRO METHANE ARE MAKING MONEY OFF THE SINS OF THE PAST
For decades, environmental protection was largely treated as a cost burden for industry. But while the global debate focuses on CO₂ reduction, another structurally attractive niche is gaining traction: the remediation of legacy contamination. Companies that tackle the contaminated sites left behind by the chemical, nuclear, and oil industries occupy one of the most stable growth markets of our time. Leading the way: US giant Clean Harbors, Swedish specialist Studsvik, and Canadian innovator Zefiro Methane.
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Commented by Jens Castner on April 23rd, 2026 | 07:50 CEST
THE PENNY STOCK, THE BAKER, AND THE FLOUR SUPPLIER: HPQ SILICON, IBU-TEC, AND AMG CRITICAL MATERIALS ARE SHAKING UP THE BATTERY MARKET
China's dominance in batteries for electric vehicles is a cause for concern among Western politicians. In their speeches, they regularly promise to reduce dependence on Beijing. Little has happened so far. But the tide is slowly turning—though those in power are playing more of a supporting role. The key players work for publicly traded companies like HPQ Silicon, IBU-tec, and AMG Critical Materials. We take a look at how this trio plans to make Europe's battery industry competitive.
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Commented by Jens Castner on April 21st, 2026 | 07:20 CEST
GOLD RUSH IN WEST AFRICA: HOW DESERT GOLD VENTURES, THOR EXPLORATIONS, AND ZIJIN MINING ARE BENEFITING
Due to high gold prices, West Africa is increasingly attracting investor attention as one of the world's most productive mining regions. Chinese giant Zijin Mining is doing everything in its power to catch up with the market leaders, but faces growing political hurdles. At the same time, Thor Explorations is demonstrating how to successfully establish itself as a highly efficient cash cow, while its much smaller competitor, Desert Gold Ventures, is on the verge of making the leap from explorer to producer.
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Commented by Jens Castner on April 20th, 2026 | 08:45 CEST
AMAZON, ALMONTY, AND VEOLIA ON A ROLLERCOASTER RIDE: BACK ON TRACK TO RECORD HIGHS AFTER THE CORRECTION
Fear and panic spread across the stock market in March. Even giants began to waver. But after a brief, albeit sharp, correction, the shares of the world's leading online retailer, Amazon, the commodities rebel Almonty, and the environmental pioneer Veolia are once again on the rise. A rollercoaster ride that may test your nerves, but teaches us once again: those declared dead live longer—and quality stocks often fall only to gather momentum for the next push toward their former highs.
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Commented by Jens Castner on April 14th, 2026 | 07:20 CEST
GOLD WITH A CLEAR CONSCIENCE: WHY B2GOLD, KOBO RESOURCES, AND PERSEUS MINING ARE WORTH A LOOK RIGHT NOW
Although the price of gold has fallen since its all-time high of over USD 5,500, the structural drivers of the boom, over-indebted nations, geopolitical turmoil, and massive central bank purchases, remain in place. However, those looking to profit from the gold rush through mining stocks don't have to invest in companies that accept environmental destruction and exploitation. Canadian producer B2Gold has demonstrated for years that responsible mining and cost efficiency are not mutually exclusive. Its Australian industry peer, Perseus Mining, operates sustainable mines in Africa with production costs amounting to less than a third of the current gold price. And the debt-free junior exploration company Kobo Resources is on the verge of its next major gold discovery in the Kossou Basin of Côte d'Ivoire, in the immediate vicinity of an existing Perseus mine.
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