Read original US cash-index levels

1. Understand the index-point unit

These records are Yahoo Finance instruments classified INDEX. They report the original daily quote.close field in index points, under a separate cash-index metric. The provider’s USD currency basis does not turn a level into a price in USD per unit or a quantity you can buy. SPY and QQQ remain separate ETF listing prices.

Each index has its own native base, composition and history. A higher point level does not show a better return or a larger market. Select one index for the historical graph; the other cards and full table remain part of the same result. This view does not normalise levels to a common base or calculate a total-return benchmark.

2. Read the source session and capture separately

The original timestamp identifies a daily source session-bucket start in America/New_York. It is retained at its original instant rather than snapped to midnight UTC. It establishes neither the time of a closing trade nor the publication time of the level. Source dates are displayed using the exchange timezone.

The displayed capture is the stored source-bundle timestamp. The three original HTTP captures retain their individual clocks in the original evidence. Equal latest session dates establish neither a simultaneous capture nor quote. The captured current regular session is excluded; unknown publication, freshness and finality remain explicit. A missing original close is a gap, not zero, and skipped sessions are not invented.

3. Use one result across cards, graph and table

The overview reads the explicitly selected known index series in one bounded raw query. The ordinary view includes all three indices. Each card shows that series’ latest original point with its own date and capture; it does not silently replace an unavailable latest value with an earlier usable level.

Selecting a graph index changes only presentation. The full table and download keep every originally selected index and source row in the same result. Open a point’s Passport to inspect its exact original decimal string, source series, evidence and quality. Rounded labels never change the source value.

4. Retain the original recipe and provenance

CSV retains the full ordinary source table in 14 columns; JSON retains the complete typed result and manifest. Switching the visible index or table page does not narrow either download. Current download rights are verified for the same result before the file is handed to the browser.

5. Compare from one shared source session

Compare indices prepares the three supported actual indices and their available common period, at most 100 calendar days. Later choose two or three indices and custom From and Through-inclusive UTC dates, then Calculate. Original index-point levels remain in their separate overview.

The comparison starts at the earliest exact source-session coordinate inside the applied interval where every selected index has a usable positive original level. Every selected index equals 100 at this one shared session. Later values follow original level divided by that index’s original basis level, multiplied by 100. Normalized values are rounded to 18 decimal places with HALF_EVEN; exact original levels remain unchanged. The requested calendar start is not silently presented as a traded session.

An original input before a later common basis stays retained without a normalized value. Absent or unusable inputs remain gaps; there is no outside-window or nearest-session replacement. Without a valid common basis the comparison is unavailable. The shared basis makes price-level movement comparable; dividends, total return, currency conversion and forecasts are outside this calculation.