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It’s Not Just What You Own, It’s How Much: Machine Learning and the Portfolio Construction Imperative

Here is an uncomfortable truth: most portfolio managers obsess over stock selection while treating portfolio construction as an afterthought. Warren Buffett once called diversification “protection against ignorance,” yet he and his successor hold over 30 stocks, each with a vastly different position size. The best investors know: success depends not just on what you own, but on how much. Yet…

Michael Schopf, CFA Michael Schopf, CFA

Backtests, Causality, and Model Risk in Quantitative Investing

An epidemiologist would not analyze an epidemic as a purely statistical pattern detached from what is known about transmission. If susceptible individuals can become infected and infected individuals can recover or be removed, that knowledge becomes part of the model’s structure. Compartmental models such as SIR (susceptible, infected, recovered) and SEIR (susceptible, exposed, infected, recovered) formalize those transitions. Statistical methods…

8577618@gmail.com 8577618@gmail.com

Putin warns Europe not to ‘wage a war’ as he meets with U.S. on Ukraine – National

Talks between Russia and the U.S. on ending the nearly four-year war in Ukraine were productive, but much work remains, Yuri Ushakov, a senior adviser to President Vladimir Putin, told reporters on Wednesday. Putin met U.S. President Donald Trump’s envoy Steve Witkoff and son-in-law Jared Kushner in the Kremlin in talks that began late Tuesday as part of a renewed push…

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Wall Street plunges in worst drop since the Iran war began – National

Stocks fell sharply Thursday, and oil prices rose as doubt took over…

Globalnews Digital Globalnews Digital

Shopbop Style Event Is On

Outfit Details:Veronica Beard Top, Levi’s Jeans, Rohe Jacket, Earrings & Similar Heels Here…

Judie Engel Judie Engel

Small Caps vs. Large Caps: The Cycle That’s About to Turn

Despite their recent struggles, small caps aren’t dead — they’re just misunderstood.…

Stunning photos of life above and below water

“Feeding Frenzy” by Jorge FontesJorge Fontes A DRAMATIC chase is afoot between…

Chen Ly Chen Ly

Kellogg’s Cereal: A Story Of Missed Strategic Opportunities

WK Kellogg – inventor of cereal – is being bought by Italian…

Steve Wunker Steve Wunker

I Tested Different Social Media Content Calendar Tools — Here’s How They Performed

What do cross-country road trips, wedding speeches, and social media marketing have…

Mark Spitznagel warns a recession might happen this year

Over the past few years, the U.S. economy has seemingly pulled off…

Will Daniel Will Daniel

Lowe’s followed Tractor Supply, Harley Davidson and John Deere in backing off DEI initiatives

Home improvement chain Lowe’s is scaling back its diversity, equity and inclusion…

Haleluya Hadero Haleluya Hadero
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