https://equityreplay.com/blog Educational guides to stock portfolio allocation, historical replays, public filings, and chart interpretation. en-us Thu, 13 Aug 2026 22:41:44 GMT https://equityreplay.com/blog/backtesting-vs-historical-portfolio-replay https://equityreplay.com/blog/backtesting-vs-historical-portfolio-replay Thu, 13 Aug 2026 12:00:00 GMT How it works Backtesting and historical portfolio replay are related but not identical. Learn which assumptions each approach can include and what Equity Replay actually measures. https://equityreplay.com/blog/equal-weight-vs-market-cap-weighted-portfolios https://equityreplay.com/blog/equal-weight-vs-market-cap-weighted-portfolios Thu, 13 Aug 2026 12:00:00 GMT Portfolio construction See how equal weighting and market-cap weighting give different influence to the same set of companies, then test the difference in a historical replay. https://equityreplay.com/blog/how-to-diversify-a-stock-portfolio-by-sector https://equityreplay.com/blog/how-to-diversify-a-stock-portfolio-by-sector Thu, 13 Aug 2026 12:00:00 GMT Portfolio basics Learn how sector diversification works, where stock overlap hides, and how to test an illustrative allocation across historical windows. https://equityreplay.com/blog/sp-500-vs-nasdaq-100 https://equityreplay.com/blog/sp-500-vs-nasdaq-100 Thu, 13 Aug 2026 12:00:00 GMT Index comparisons Compare the S&P 500 and Nasdaq-100 by universe, weighting, overlap, and historical behavior without treating either index as a prediction. https://equityreplay.com/blog/what-is-a-13f-filing https://equityreplay.com/blog/what-is-a-13f-filing Thu, 13 Aug 2026 12:00:00 GMT Public disclosures Understand what Form 13F reports, what it leaves out, why it is delayed, and how to turn a filing into a careful historical portfolio snapshot. https://equityreplay.com/blog/how-to-build-a-stock-portfolio-with-percentages https://equityreplay.com/blog/how-to-build-a-stock-portfolio-with-percentages Mon, 10 Aug 2026 12:00:00 GMT How to use Equity Replay A simple way to turn a list of stocks into an editable historical replay with clear weights and a chart you can inspect. https://equityreplay.com/blog/how-to-compare-portfolio-performance-over-time https://equityreplay.com/blog/how-to-compare-portfolio-performance-over-time Mon, 10 Aug 2026 12:00:00 GMT Reading the chart The same allocation can tell different stories across different historical windows. Here is how to compare those views without overreading them. https://equityreplay.com/blog/stock-portfolio-allocation-examples-by-style https://equityreplay.com/blog/stock-portfolio-allocation-examples-by-style Mon, 10 Aug 2026 12:00:00 GMT Portfolio ideas Start with a concrete portfolio idea, assign percentages, and use the historical chart to understand how the mix would have moved. https://equityreplay.com/blog/what-is-a-stock-portfolio-simulator https://equityreplay.com/blog/what-is-a-stock-portfolio-simulator Mon, 10 Aug 2026 12:00:00 GMT How it works See exactly how weights, close prices, date ranges, and a starting value become the chart—without interim trades or rebalancing. https://equityreplay.com/blog/what-the-buffett-portfolio-filing-really-shows https://equityreplay.com/blog/what-the-buffett-portfolio-filing-really-shows Mon, 10 Aug 2026 12:00:00 GMT Public disclosures A Berkshire filing can be a useful historical snapshot, but it should not be presented as Warren Buffett’s complete personal portfolio.