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Is Day Trading Stocks a Viable Strategy?
Investment Theory Kieran Cook Investment Theory Kieran Cook

Is Day Trading Stocks a Viable Strategy?

Day trading is often seen as a fast-paced path to financial freedom, but the reality is far more challenging—especially when factoring in trading costs. In the UK, the absence of a pattern day trader rule makes entry easier, yet most traders still lose money over time. Drawing on studies from the US, UK, and Taiwan, this post explores why only a small fraction of day traders manage to stay profitable after costs. Discover the skills, risks, and psychological resilience required to beat the odds, and why the allure of quick profits often masks a grueling reality.

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How Often Should You Rebalance Your Portfolio?
Investment Theory Kieran Cook Investment Theory Kieran Cook

How Often Should You Rebalance Your Portfolio?

How often should you rebalance your portfolio? While many investors treat rebalancing as routine, research by Jeremy Siegel suggests that leaving portfolios untouched—particularly when it comes to broad indices like the S&P 500—can actually lead to superior long-term returns. This post explores the trade-off between managing risk and letting winners run, and asks whether doing less might sometimes achieve more.

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The Hidden Costs of Indexing: What Investors Should Understand
Investment Theory Kieran Cook Investment Theory Kieran Cook

The Hidden Costs of Indexing: What Investors Should Understand

Index funds like Vanguard’s VTI are often praised for their low fees, transparency, and diversification — and for good reason. But beneath the surface of these low-cost strategies lie hidden frictions that can quietly erode investor returns. This article explores the lesser-known costs of index investing: from forced trading and front-running to adverse selection and sector concentration. It also highlights how Dimensional Fund Advisors (DFA) takes a smarter, more flexible approach — using patient, systematic trading to avoid these inefficiencies and deliver more cost-effective exposure to the market. For investors who want to stay passive but get more from their portfolios, understanding these hidden costs is key.

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Can Active Fund Managers Consistently Outperform the Market? (Part One)
Investment Theory Kieran Cook Investment Theory Kieran Cook

Can Active Fund Managers Consistently Outperform the Market? (Part One)

Active fund management has long promised to beat the market—but does it deliver? This post explores the evidence behind active versus passive investing, unpacking costs, market efficiency, and the realities of stock selection. Backed by research and real-world data, it challenges the assumption that active managers can consistently outperform their benchmarks.

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