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 BLK…
⚠ 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 | 813K | $909.5M | 813K $909.5M | 1.14× +14% avg 716K · $757.4M, Oct 22, 2025 – Oct 22, 2026 |
| Last week 5 sessions | Oct 19 – Oct 23 | 4.0M | $4.55B | 805K $910.9M | 1.12× +12% avg 719K · $760.1M, Oct 16, 2025 – Oct 16, 2026 |
| Last month 21 sessions | Sep 25 – Oct 23 | 13.9M | $15.24B | 661K $725.8M | 0.92× −8% avg 719K · $764.2M, Sep 24, 2025 – Sep 24, 2026 |
| Last year 252 sessions | Oct 23, 2025 – Oct 23, 2026 | 180.7M | $191.07B | 717K $758.2M | 1.01× +1% avg 712K · $722.7M, Oct 21, 2024 – Oct 22, 2025 |