Marc Gerstein

Marc Gerstein is an unconventional "quant." He has long specialized in rules- and factor-based equity-investing strategies. And he authored two books on stock screening – Screening the Market and The Value Connection. Marc's quant inclinations trace back to his early days as an attorney (mainly criminal and landlord-tenant proceedings). In that world, everything Marc did had to be supported by evidence or legal authority. He first applied this evidence-oriented approach at Value Line, an independent investment-research firm that he joined in 1980. There, he learned to relate human investment stories to that company's "Timeliness" ranking system. During the mid-1980s, Marc managed the Value Line Aggressive Income Trust. That's a high-yield ("junk") bond open-end mutual fund. He steered the fund through the Drexel Burnham scandals and the related junk-bond storms. He came away from that experience with a non-academic but highly reality-based understanding of risk.

These Beloved Growth Stocks Could Soon ‘Age Out’

“One day, Amazon will fail. Amazon will go bankrupt.” That might sound like a haphazard prediction at first. After all, Amazon (AMZN) is the fourth-largest company in the U.S. today. It’s valued at more than $1 trillion. The story gets more interesting when you learn who uttered those words… Amazon founder and former CEO Jeff …

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Some ‘Basement Kids’ Are Portfolio Stars

Avalara (AVLR) intrigues me… You’ve probably never heard of the company. In short, it aims to be a leading global cloud-based, tax-compliance platform. And it went public in mid-2018 in pursuit of that dream. Sure, it sounds like a snooze. Thrill-seeking investors don’t seek out tax-compliance companies, after all. But for businesses that operate across …

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These ‘Basement-Dwelling Kids’ Can Ruin Your Returns

As parents, we spend many years handholding our children… After all, they’re not expected to know everything. And they’re not expected to do a whole heck of a lot either – at least, not at first. But we do all that with one important expectation in mind… Eventually, we expect our children to grow into …

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How Mr. Contrarian Beats Mr. Market

Think of stock analysis like a trial… Mr. Market is on one side. He argues for following trends reflected in stock charts. He also supports working with technical-analysis indicators and sentiment-related data. Mr. Contrarian opposes Mr. Market. “Be smarter,” he says. “Buy when others are fearful. Sell when they’re greedy.” But as I explained yesterday, …

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Don’t Let Wall Street Make You Into Harrison Bergeron

Index investors suffer from what I call “Harrison Bergeron syndrome”… Harrison Bergeron is the title character in a short story from American writer Kurt Vonnegut’s Welcome to the Monkey House collection. It was first published in 1961. The short story is set in 2081. In this dystopian future, the government forces smarter, more attractive, and …

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