The math behind portfolio optimization has a problem. If you have N stocks and only T days of data, your correlation matrix is mostly noise. In this video, only 8 eigenvalues out of 400 were real signal. The other 392 were statistical illusion. The fix comes from nuclear physics. In 1955 Wigner used random matrix theory to model the energy levels of uranium nuclei. In 1967 Marchenko and Pastur extended his framework to sample covariance matrices, giving the exact formula for which eigenvalues ar
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The math behind portfolio optimization has a problem. If you have N stocks and only T days of data, your correlation matrix is mostly noise. In this video, only 8 eigenvalues out of 400 were real signal. The other 392 were statistical illusion. The fix comes from nuclear physics. In 1955 Wigner used random matrix theory to model the energy levels of uranium nuclei. In 1967 Marchenko and Pastur extended his framework to sample covariance matrices, giving the exact formula for which eigenvalues ar
233.1K views2 months ago
TikTokmirkovicdev
Each human cell contains about 6 feet (2 meters) of DNA packed inside its tiny nucleus
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Each human cell contains about 6 feet (2 meters) of DNA packed inside its tiny nucleus
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YouTubeJustin Danger Nunley
Niels Bohr was a Danish physicist who made major contributions to the understanding of atomic structure and quantum theory.In 1913,he developed the Bohr Model of the Atom,which proposed that electrons move around the nucleus in fixed energy levels.According to his model,electrons can jump from one energy level to another by absorbing or releasing energy.This theory helped explain how atoms behave and why they emit light at specific wavelengths.Bohr's work became a foundation of modern atomic phy
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Niels Bohr was a Danish physicist who made major contributions to the understanding of atomic structure and quantum theory.In 1913,he developed the Bohr Model of the Atom,which proposed that electrons move around the nucleus in fixed energy levels.According to his model,electrons can jump from one energy level to another by absorbing or releasing energy.This theory helped explain how atoms behave and why they emit light at specific wavelengths.Bohr's work became a foundation of modern atomic phy
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Boss vs. Childhood Pics: Who Grew Up Best?
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Boss vs. Childhood Pics: Who Grew Up Best?
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Nucleus Overload: Aumenta tus fibras musculares
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Nucleus Overload: Aumenta tus fibras musculares
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Kian Sadeghi, CEO of Nucleus Genomics, wants to help parents design their own babies, from height to IQ to personality traits. What happens to humanity when we have the power to tamper with life’s formula?
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Kian Sadeghi, CEO of Nucleus Genomics, wants to help parents design their own babies, from height to IQ to personality traits. What happens to humanity when we have the power to tamper with life’s formula?
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Pevina's Chiropractic Adjustment at Nucleus Chiropractic
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Pevina's Chiropractic Adjustment at Nucleus Chiropractic
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Nucleus Health & Fitness: ShaaFitness Workout Highlights
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Nucleus Overload: Crece tus brazos rápidamente
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El objeto seleccionado en la imagen es una recreación en impresión 3D del experimento con el Núcleo del Demonio (Demon Core), una esfera de plutonio de 6.2 kg [3] que protagonizó un trágico accidente nuclear el 21 de mayo de 1946 en el Laboratorio Nacional de Los Álamos. Durante una demostración de criticidad, el físico Louis Slotin sostenía la semiesfera superior de berilio utilizando únicamente la punta de un destornillador plano en lugar de las cuñas mecánicas de seguridad requeridas. El dest
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What is Radioactivity? Marie Curie & Henri Becquerel
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Cells 🔬 Top tips for 12th May • Eukaryotic cells are animal, plant and fungal cells as they have a nucleus • Prokaryotic cells such as bacteria do not have a nucleus • Eukaryotic and prokaryotic cells share similar ones such as cytoplasm, cell membrane & Ribosomes
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Understanding Fertilization and Embryonic Development
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What If You Shrunk 1cm Every Second?
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Summer Camp & Academic Registration Open – Nucleus International School
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The Science Behind the Atomic Detonation
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NICU @Nucleus General Hospital #NICU #fyp #generalhospital #nucleus
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TikToknucleus_general_hospital
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I made this last night! Check out my track while learning some cool facts about the universe! I thought it was appropriate as I keep seeing posts of TON 618. I pay homage to the giants. They are the nucleus of our galaxies. The true
1.8K views1 month ago
TikTokmiketon618
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How Cancer Grows Inside You Cancer occurs when cells divide uncontrollably, disrupting the body's natural balance. Genes in the celle nucleus normally keep this process in check but when they fail, cancer can develop. Learn more about how it happens in the full podcast: https://pcc.sg/dr-ang-tdk-podcast
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TikTokdocwillieong
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Meet the Boss of the Cell | Nucleus Explained #cell #biology #study #science #yt #shorts #student
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