Foundations of Equity Portfolio Construction: Allocation, Diversification, and Risk

Many investors accumulate stock positions without a coherent portfolio construction framework — buying what seems attractive, avoiding sectors they dislike, and hoping the collection adds up to a sensible whole. Without intentional diversification and clear risk parameters, a portfolio can carry far more concentration risk than its owner realizes, or sacrifice return through over-diversification that provides no real benefit. By the end of this course you will be able to define and distinguish systematic risk from idiosyncratic risk, explain how correlation between holdings affects portfolio volatility, construct a basic equity portfolio with deliberate sector and factor diversification, and articulate a rebalancing rule that maintains your intended risk exposure over time. What you will learn: - Systematic versus idiosyncratic risk: what diversification can and cannot eliminate - Correlation and its role in portfolio construction: why two high-risk assets can combine into a lower-risk portfolio - Asset allocation within equities: how to think about domestic versus international, large versus small, value versus growth - Risk tolerance assessment: matching portfolio construction to time horizon, income stability, and emotional response to losses - Position sizing: equal weighting, conviction weighting, and risk-based weighting compared - Diversification across sectors and industries: avoiding hidden concentration in correlated businesses - Rebalancing: why portfolios drift, when to rebalance, and calendar-based versus threshold-based approaches - Portfolio benchmarking: how to evaluate whether your construction decisions are adding or subtracting value The course uses annotated portfolio examples — a concentrated five-stock portfolio, a moderately diversified twenty-stock portfolio, and an overly fragmented fifty-stock portfolio — to illustrate how construction decisions affect measured risk and expected diversification benefit. Readings introduce each concept; reflection prompts ask you to evaluate a fictional portfolio for hidden concentration or missing diversification. A portfolio construction worksheet guides you through defining your own allocation framework. This course is designed for individual investors managing their own equity portfolios, financial planning students, and professionals entering wealth management who are new to portfolio theory. No prior knowledge of advanced statistics is required. This course is informational and educational; it does not constitute investment advice, and portfolio decisions should reflect your individual financial situation and be reviewed with a qualified advisor.