This page measures how far the portfolio fell during four notable market events and compares the fall to three benchmarks on the same dates. For each event a baseline date is the peak before the fall and a trough date is the bottom. Prices come from Yahoo Finance via the Cloudflare proxy. The first fetch takes a couple of minutes because it pulls hundreds of price points; results are then cached in this browser so subsequent visits load instantly. Use Export JSON to keep a portable copy of the cache and Load JSON to restore it later or on another device.