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 August 24th, 2026 | 08:25 CEST
From Power Plants to Servers: NU E Power, PFISTERER and Dell at the Key Junctures of the AI Boom
Created and Published on Behalf of NU E Power Corp.
The AI hype on the stock market usually revolves around the same old heavyweights. While the massive investments by Alphabet, Amazon, and others are fueling controversial discussions, the real bottleneck of the boom lies further down the value chain—in energy generation, its distribution, and the hardware that ultimately converts it into computing power. Those who recognize this connection will find attractive investment opportunities even beyond the well-known names. This is exactly where NU E Power, PFISTERER, and Dell Technologies come in. Three completely different companies, but each representing one of the closely intertwined stages of the same story: making money long before the giants' investments pay off.
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Commented by Jens Castner on August 21st, 2026 | 07:35 CEST
The AI Agent Thriller: SAP Delivers, C3.ai Stumbles – and Miivo Aims for the Lead Role
Created and Published on Behalf of Miivo AI.
For months, Germany's largest software company, SAP, was cast as the prime suspect in an industry supposedly facing disruption from AI agents—until its quarterly results delivered a surprising twist to the story. Meanwhile, C3.ai demonstrates just how quickly the hunter can become the hunted when the agent AI narrative fails to translate into sufficient revenue growth. Positioned in the middle is Miivo AI, a Canadian newcomer that has operated largely behind the scenes so far and is targeting precisely the market where SAP established a strong foothold more than two decades ago: the SMB market. So, who has the best chance of a happy ending in this stock market thriller?
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Commented by Jens Castner on August 20th, 2026 | 07:50 CEST
Ammunition, Engines, Mines: Rheinmetall, Mercedes-Benz and Power Metallic Mines in the Raw Materials Race
The defence industry is booming, the automotive sector is electrifying—and both are competing for many of the same raw materials: copper, nickel, and platinum-group metals. Their production is often concentrated in politically sensitive regions such as Russia, while China controls a large share of global processing. The result: companies that fail to secure supplies in time risk production lines grinding to a halt. Rheinmetall needs these metals for ammunition and armoured vehicles, Mercedes-Benz needs them for batteries and electric motors, and Power Metallic Mines aims to supply them. We take a closer look at the potential upside for the shares of this trio.
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Commented by Jens Castner on August 19th, 2026 | 07:30 CEST
BASF, dynaCERT, Andritz: Three Strategies, One Goal—and Up to 600% Upside Potential!
High energy costs in Germany, weak growth in Europe, and US tariffs that are making life difficult for exporters: for many companies, their traditional markets are becoming a trap. Three examples show how they can break free. The German chemical giant BASF is betting billions on China; the Canadian cleantech specialist dynaCERT is on the verge of a breakthrough in Vietnam; and the Austrian plant manufacturer Andritz is proving that the strategy pays off. Investors who take this bold path have the chance to earn attractive dividends and price gains of up to 600%.
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Commented by Jens Castner on August 18th, 2026 | 07:15 CEST
HPQ Silicon, Wacker Chemie, Cabot: Three Stocks, One Material — and a Billion-Dollar Market Few Investors Know
It is found in toothpaste, car tires and even the paint coating on kitchen cabinets, yet few investors have ever heard of it. Fumed silica (pyrogenic silica) is an inconspicuous white powder that has quietly supported entire industries for decades, from cosmetics and adhesives to food production. This multi-billion-dollar niche market is divided among a few established players, including Germany's Wacker Chemie and its US counterpart Cabot—two names that stand for solidity and scale on the stock market. Now, a small Canadian challenger is looking to enter the market: HPQ Silicon aims to break into the sector with a new, more cost-effective production process while also having a second, at least equally exciting technology up its sleeve.
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Commented by Jens Castner on August 17th, 2026 | 07:05 CEST
The Secret of Hidden Treasures: Why Allianz, BP and Lahontan Gold Could Be Re-Rated
Some treasures lie deep beneath the ground. Others are well hidden in balance sheets. And some are simply waiting for the right catalyst to emerge. Canadian explorer Lahontan Gold is on track to potentially multiply its underlying asset value with spectacular drill results. Allianz shares have been climbing relentlessly following a strategic multibillion-euro deal in Asia. And geopolitical price shocks are generating unexpected additional profits for energy giant BP. Where are these hidden treasures, and how could the combination of drill results, balance-sheet strength and oil barrels trigger a powerful re-rating?
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Commented by Jens Castner on August 14th, 2026 | 09:30 CEST
Apple, Volatus Aerospace and innoscripta: One Giant and Two Rising Stars with Multiplier Potential
Is a company valued on the stock market for what it produces—or for what investors want to see in it? At Apple, the high-margin services business is fueling heated debates over whether the core of its success story actually lies more in software or hardware. Volatus Aerospace, originally a Canadian drone service provider, is on the verge of exactly this leap: moving away from low-margin flight operations toward a software and AI platform for drone countermeasures and defence technology. And innoscripta demonstrates the growth rates possible in the software industry. A look at three very different companies and the question of where the biggest valuation gap between business model and share price lies.
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Commented by Jens Castner on August 13th, 2026 | 08:00 CEST
Berkshire Hathaway, Novo Nordisk & Zefiro Methane: Do Good and Profit From It – Up to 250% Potential!
Berkshire Hathaway and Novo Nordisk have clearly exceeded expectations with their latest quarterly results. We take a closer look at these two heavyweights—and in the process, we also turn our attention to a small environmental services provider that, according to analysts, could offer significant potential for a tenfold return. Zefiro Methane embodies one of Warren Buffett's mottos particularly closely: do good and talk about it—or, even better, do good and make money from it.
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Commented by Jens Castner on August 12th, 2026 | 07:30 CEST
Buckle Up for a Short Squeeze: Could Almonty and HelloFresh Follow SpaceX's Rocket Launch?
When short sellers are caught off guard, it can lead to veritable price explosions. Although no supernova was observed at the aerospace company SpaceX last week, it was definitely more than a gentle liftoff: the share price shot up by more than 15% following its quarterly results. Notably high short positions have also recently built up for the tungsten producer Almonty Industries and the meal-kit delivery service HelloFresh. With earnings reports just around the corner for both stocks, these numbers could become the catalyst for an even bigger move.
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Commented by Jens Castner on July 31st, 2026 | 07:05 CEST
New to the Index, Then Hit Hard: Hochtief, Almonty Industries, AT&S, and Marvell Technology Put to the Test
Inclusion in a major stock index is often considered a mark of distinction. But at the end of June, it turned into a trap for four stock market stars. Anyone who bet on DAX newcomer Hochtief, the promising tungsten stock Almonty Industries, or the AI-linked high-flyers AT&S and Marvell Technology suffered double-digit share price losses within just a few weeks. This is no coincidence, but rather the result of a market mechanism that investors should be aware of—and one that may now be creating attractive buying opportunities. We take a closer look at all four stocks and compare their current share prices with analysts' price targets.
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