Jerome Busca: Inside Citadel, Alpha Decay and the Future of Quant | Blushing Quants #31

Vincent Randazzo: Market Breadth, Risk and Systematic Portfolio Management | Blushing Quants #32

Vincent Randazzo, CMT, is a portfolio manager and technical market strategist with more than 25 years of experience across firms including Morgan Stanley, UBS, ICAP, CFRA Research, and Lowry Research. After observing that investors have access to more market data than ever but often lack clarity on how to use it, Vincent developed Defender, a quantitative, rules-based framework designed to support more objective portfolio and risk-management decisions. He is also the founder of ViewRite Advisors and manages the Defender Risk Adaptive 500 ETF, ticker SPDF. In this episode of The Blushing Quants, Vincent joins us for a practical conversation about market breadth, regime detection, technical analysis, systematic investing, and how portfolio managers can respond when the market’s apparent strength does not reflect what is happening beneath the surface. The central question is: Can market breadth reveal risks that traditional market indexes fail to show? Vincent explains why market-cap-weighted indexes can create a misleading picture when a small group of large companies drives most of the market’s performance. We discuss how breadth indicators measure participation across large-cap, mid-cap, and small-cap stocks to assess the market’s underlying health, detect fragility, and identify changing conditions. We explore Vincent’s rules-based approach to adjusting equity exposure across different market regimes. He explains why market deterioration often happens gradually, why market bottoms can develop more quickly, and how historical evidence can help investors distinguish between healthy pullbacks and more serious changes in risk. The conversation also covers momentum, relative strength, moving averages, trailing stops, changing correlations, and the importance of interpreting technical indicators within the correct market environment. Vincent explains why being above a moving average is not enough, why its direction also matters, and why context is essential when evaluating any signal. Vincent also shares lessons from his own investment mistakes and from navigating the 2008 financial crisis. We discuss the danger of becoming emotionally attached to an investment thesis, why successful risk management requires both an exit and re-entry process, and how systematic rules can reduce the influence of ego and emotion. Finally, we examine active versus passive investing, the role of technical analysis within institutional portfolio management, and how market technicians can complement fundamental portfolio managers by improving timing, risk awareness, and decision consistency. A thoughtful and practical conversation on market breadth, portfolio management, regime detection, momentum, technical analysis, and building a systematic approach to investment risk.   *DISCLAIMER* The information shared on this podcast is for educational and informational purposes only and reflects the personal opinions of the hosts and guests at the time of recording. Nothing in this podcast constitutes financial, investment, legal, tax, or trading advice, and nothing should be interpreted as a recommendation to buy, sell, or hold any security, cryptocurrency, derivative, or financial product. Trading and investing involve substantial risk, including the possible loss of all or part of your capital. You are solely responsible for your own decisions, and you should consult a qualified professional before making financial decisions. By listening to this podcast, you agree that the hosts, guests, and producers are not liable for any losses or damages arising from the use of any information discussed.

Jerome Busca: Inside Citadel, Alpha Decay and the Future of Quant | Blushing Quants #31

Jerome Busca is a quantitative trader with more than 25 years of experience across mathematics, quantitative research, portfolio management, global futures, foreign exchange, and crypto markets. After beginning his career in academic mathematics and applied research in France, Jerome moved into quantitative finance and later joined Citadel’s hedge fund business. Working on the mortgage desk before the 2008 financial crisis, while also helping develop a systematic CTA-style futures operation, gave him a front-row view of how institutional quantitative research, technology, and market risk evolved during a defining period in modern finance. In this episode, Jerome joins us for a wide-ranging conversation about how quantitative trading has changed and what remains fundamentally difficult despite better data, infrastructure, and artificial intelligence. The central question is: As technology makes quantitative research faster and more accessible, does finding sustainable alpha become easier, or does the competition simply become more intense? Jerome explains how global futures research was conducted before Python, modern data infrastructure, and AI transformed the industry. We discuss why technological infrastructure became a competitive advantage for firms such as Citadel, how arbitrage makes markets more efficient, and why the lifespan of many trading edges has fallen from seconds to microseconds. We also examine portfolio construction and the limitations of traditional correlation-based optimization. Jerome shares his perspective on Markowitz optimization, regularization, Bayesian approaches, factor models, hierarchical covariance, equal-risk allocation, fat-tailed returns, conditional correlations, copulas, and why simple portfolio methods can be surprisingly difficult to outperform. The conversation goes deeper into causality, hidden common drivers, changing market regimes, crisis correlations, and the danger of confusing statistical relationships with genuine economic mechanisms. Jerome also explains why researchers and portfolio managers should remain cautious when translating attractive academic findings into live investment decisions. Finally, we discuss the growing influence of AI on quantitative finance, including how individual researchers can now build tools that once required institutional teams, why professional data infrastructure remains essential, and how easier backtesting can create an even greater risk of overfitting and false confidence. We conclude by exploring emerging markets and new areas of quantitative research, including crypto, perpetual futures, prediction markets, alternative data, and even the possibility of applying systematic methods to art valuation. A thoughtful and practical conversation on alpha decay, portfolio construction, causality, artificial intelligence, emerging markets, and the continuing evolution of quantitative finance.   *DISCLAIMER* The information shared on this podcast is for educational and informational purposes only and reflects the personal opinions of the hosts and guests at the time of recording. Nothing in this podcast constitutes financial, investment, legal, tax, or trading advice, and nothing should be interpreted as a recommendation to buy, sell, or hold any security, cryptocurrency, derivative, or financial product. Trading and investing involve substantial risk, including the possible loss of all or part of your capital. You are solely responsible for your own decisions, and you should consult a qualified professional before making financial decisions. By listening to this podcast, you agree that the hosts, guests, and producers are not liable for any losses or damages arising from the use of any information discussed.

Paul Chalmers: Trading Education Done Right - AI, Risk & Real Market Education | Blushing Quants #30

Paul Chalmers, CEO of UK Trading Academy, for a raw and practical conversation about what most traders misunderstand about the markets. Paul breaks down why trading education often fails, why theory alone is not enough, and how real market experience, risk management, psychology, and disciplined execution separate serious traders from the crowd. We discuss how markets have changed, the role of AI and algorithms in modern trading, and why technology should support human decision-making rather than replace it. Paul explains how his team approaches dynamic algorithms, probability-based signals, market movements, and the importance of combining data with practical trading judgment. The conversation also goes deep into geopolitical events, GBP/USD, oil, institutional traders, market makers, retail trading mistakes, trading plans, position sizing, drawdowns, and why backtesting should be used to understand risk — not just to chase beautiful profit curves. This episode is for traders, quants, market researchers, and anyone who wants to understand the difference between learning to trade and actually learning to make decisions in live markets.   PODCAST LINKS: UK Trading Academy: https://uktradingacademy.com/ [https://uktradingacademy.com/] Paul's LinkedIn: https://www.linkedin.com/in/paulchalmersuk/ [https://www.linkedin.com/in/paulchalmersuk/]   PODCAST INFO: Spotify: https://open.spotify.com/show/4jw3ouXrmbsToKtGY9q80O [https://open.spotify.com/show/4jw3ouXrmbsToKtGY9q80O] Apple Podcasts: https://podcasts.apple.com/us/podcast/the-blushing-quants-podcast/id1864851089 [https://podcasts.apple.com/us/podcast/the-blushing-quants-podcast/id1864851089] Amazon Music: https://music.amazon.com/podcasts/cf63850e-9f1f-491d-a794-0695e85ccaa6 [https://music.amazon.com/podcasts/cf63850e-9f1f-491d-a794-0695e85ccaa6] RSS: https://feed.podbean.com/theblushingquants/feed.xml [https://feed.podbean.com/theblushingquants/feed.xml] Full episodes playlist: https://www.youtube.com/playlist?list=PLFHtE5XlBV_VdWEnca58iQSTAXj6O-CfG [https://www.youtube.com/playlist?list=PLFHtE5XlBV_VdWEnca58iQSTAXj6O-CfG]   *DISCLAIMER* The information shared on this podcast is for educational and informational purposes only and reflects the personal opinions of the hosts and guests at the time of recording. Nothing in this podcast constitutes financial, investment, legal, tax, or trading advice, and nothing should be interpreted as a recommendation to buy, sell, or hold any security, cryptocurrency, derivative, or financial product. Trading and investing involve substantial risk, including the possible loss of all or part of your capital. You are solely responsible for your own decisions, and you should consult a qualified professional before making financial decisions. By listening to this podcast, you agree that the hosts, guests, and producers are not liable for any losses or damages arising from the use of any information discussed.

Jonathan Davies: The Theory That Challenges Every Trader and Investor | Blushing Quants #29

Jonathan Davies is an economist with over 30 years of experience in financial services. Jonathan has worked across several areas of the investment world, including fixed-income research, portfolio strategy, and portfolio management. His career has focused mainly on the macroeconomic side of markets, examining areas such as interest rates, bond yields, currency movements, equity-versus-bond allocation, regional market preferences, and multi-asset portfolio construction. Unlike a single-stock analyst, Jonathan’s perspective comes from understanding how the broader market system works: how economies move, how asset classes interact, how portfolios are built, and how professional investors communicate strategy and risk to clients. In this conversation, we explore one of the most important ideas in financial theory: the Efficient Market Hypothesis. If markets already reflect available information, what does it really mean to be an active investor? Can portfolio managers consistently beat the market, or does outperformance require a clear philosophy, discipline, and a deep understanding of where market inefficiencies may still exist? Jonathan explains why EMH is such a compelling idea, why active management is a strong claim, and why a portfolio manager needs more than past performance to build trust with clients. We also discuss what happens when an investment thesis stops working, how managers think about risk, and why different strategies may work well in some market environments and struggle in others. This episode is a thoughtful conversation about market efficiency, active investing, macro strategy, and the real responsibility of managing capital in uncertain markets.   *DISCLAIMER* The information shared on this podcast is for educational and informational purposes only and reflects the personal opinions of the hosts and guests at the time of recording. Nothing in this podcast constitutes financial, investment, legal, tax, or trading advice, and nothing should be interpreted as a recommendation to buy, sell, or hold any security, cryptocurrency, derivative, or financial product. Trading and investing involve substantial risk, including the possible loss of all or part of your capital. You are solely responsible for your own decisions, and you should consult a qualified professional before making financial decisions. By listening to this podcast, you agree that the hosts, guests, and producers are not liable for any losses or damages arising from the use of any information discussed.

Eren Biri: How Volatility Traders Think and What Defines AI-Native Hedge Fund | Blushing Quants #28

Eren Biri is the founder of OneEye Capital, a volatility-focused investment firm built around a strong mix of quantitative research, discretionary overlays, and deeply engineered infrastructure. With a background in computer engineering, experience at Goldman Sachs and multiple hedge funds, and a career that moved from quant research into trading and portfolio management, he brings a highly practical perspective on what it really takes to run a modern options-focused fund. In this episode, we get into volatility trading, options markets, and the real mechanics of running a fund where risk management comes first. Eren explains how his firm combines systematic strategies with discretionary overlays, why discretionary thinking still matters even in a quant-heavy setup, and how macro awareness, cross-asset relationships, and scenario analysis shape the way he sizes, hedges, and protects positions. We talk about how options traders think in implied probabilities, how relative value opportunities show up across equities, rates, commodities, and volatility surfaces, and why the goal is often not to predict direction but to isolate the exact risk factor you want to own. Eren breaks down delta, vega, theta, gamma, hedging, and portfolio construction, and explains how his team decomposes option markets into tradable components rather than treating them as a single undifferentiated space. Also, explore how a small fund can compete by being engineering-heavy and infrastructure-native. Eren shares how OneEye built its own in-house stack, stores and processes massive options datasets on its own hardware, and uses AI and machine learning tools for signal calibration, regime classification, portfolio optimization, and empirical pricing, without sacrificing explainability where it matters most. On top of that, we discuss what it looks like to run a cross-border team, how to keep a small technical organization aligned around markets, and how to position a young fund in front of investors by offering institutional-grade discipline, strong risk management, and access to strategies most allocators usually only see inside elite buy-side firms.   *DISCLAIMER* The information shared on this podcast is for educational and informational purposes only and reflects the personal opinions of the hosts and guests at the time of recording. Nothing in this podcast constitutes financial, investment, legal, tax, or trading advice, and nothing should be interpreted as a recommendation to buy, sell, or hold any security, cryptocurrency, derivative, or financial product. Trading and investing involve substantial risk, including the possible loss of all or part of your capital. You are solely responsible for your own decisions, and you should consult a qualified professional before making financial decisions. By listening to this podcast, you agree that the hosts, guests, and producers are not liable for any losses or damages arising from the use of any information discussed.