Do the recent five-year returns from market index funds vary widely? They can vary, but not as wildly as it might seem from headlines—most broad, low‑cost market index funds with similar mandates cluster fairly tightly over five‑year periods, with bigger gaps only when the underlying exposures differ meaningfully. When returns are similar Among funds that track the same index (e.g., multiple S&P 500 index funds), five‑year differences are usually small, often within roughly 0.2–1% per year, driven mainly by expense ratios, tracking error, and tiny implementation differences. Over a full five‑year span that might add up to a couple of percentage points in cumulative performance, but not tens of percentage points. When returns diverge more Five‑year returns do spread out once you compare funds tracking different parts of the market: U.S. large‑cap vs U.S. small‑cap. U.S. vs developed ex‑U.S. vs emerging markets. Equity vs bond index funds....
Which index should I follow to understand how the investment markets are doing? For most purposes, the single best “how are markets doing?” gauge is the S&P 500 for U.S. stocks, paired with one broad global stock index and one broad bond index if you want a fuller picture. Core index to watch S&P 500 (U.S. large‑cap stocks): Tracks about 500 of the largest U.S. companies and is the standard benchmark for the U.S. equity market. Why it works: Broad, diversified, market‑cap weighted, and used by most professionals as the primary reference point for “the market.” Other useful equity indices Dow Jones Industrial Average: Only 30 big U.S. companies, price‑weighted, more of a media headline barometer than a true market proxy. Nasdaq Composite: All stocks listed on Nasdaq, heavily tilted to tech and growth; good for sensing risk appetite in growth/tech but not the whole market. Major non‑U.S. indices: Examples include the UK...