Relative volume compares how much a stock is trading now vs its usual pace. High RVOL means it’s “in play” — the fuel small-cap movers run on. Enter a ticker to see its volume and dollar volume for the last session, week, month and year, each against an average session.
Checking volume for MAS…
⚠ End-of-day data — this compares the last full session’s volume to the trailing average, not live intraday RVOL. Real-time intraday relative volume is on the roadmap. RVOL ≥ 2-3× often flags a stock in play; ≥ 5× is extreme.
Each period’s average session against the average session in the 252 sessions (one trading year) before it, so a period is never compared with itself. The year row is compared with the year before it.
| Period | Sessions | Shares | Dollar volume (est.) | Per session | vs average session before |
|---|---|---|---|---|---|
| Latest session 1 session | Oct 23 | 2.6M | $199.7M | 2.6M $199.7M | 1.02× +2% avg 2.6M · $178.1M, Oct 22, 2025 – Oct 22, 2026 |
| Last week 5 sessions | Oct 19 – Oct 23 | 11.2M | $849.4M | 2.2M $169.9M | 0.88× −12% avg 2.6M · $177.3M, Oct 16, 2025 – Oct 16, 2026 |
| Last month 21 sessions | Sep 25 – Oct 23 | 43.0M | $3.06B | 2.0M $145.5M | 0.80× −20% avg 2.6M · $176.6M, Sep 24, 2025 – Sep 24, 2026 |
| Last year 252 sessions | Oct 23, 2025 – Oct 23, 2026 | 649.2M | $44.98B | 2.6M $178.5M | 1.28× +28% avg 2.0M · $141.1M, Oct 21, 2024 – Oct 22, 2025 |