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Energy Recovery ERII 7.03 0.04 0.57%

ERII Historical Options Analysis

Explore ERII (Energy Recovery) historical options data, volatility, Greeks and positioning. Compare signals over time in the free Historical Lab preview.

Previous-day view · Mon Sep 21 close. You are previewing the previous trading day. Subscribe to see today live and every other date — plans start at Delta, $39/mo. Sign up Sign in
Group
Window
Scale
Plotted 3/8
Metric library

Volatility

Interactive timeline

ERII / Comparative study

3 signals / 502 sessions
Window statistics

Signal snapshot

Current value vs. selected history
IV Rank z -0.97
15.01
Mean
31.45
Window
+69.8%
ATM IV z -0.55
0.48
Mean
0.59
Window
+52.0%
IV Percentile z -0.97
27.78
Mean
57.46
Window
+1289.0%
Relationship matrix

Correlation

Pearson r
Signal IV Rank ATM IV IV Percent...
IV Rank 1.00 0.81 0.82
ATM IV 0.81 1.00 0.83
IV Percent... 0.82 0.83 1.00
Source observations

Data inspector

1-50 of 502
  • 1 / 11
Date Close IV Rank ATM IV IV Percentile
2026-09-21 7.03 15.01 0.48 27.78
2026-09-18 6.99 31.11 0.74 66.8
2026-09-17 7.05 23.39 0.62 50.99
2026-09-16 7.1 23.44 0.62 51.38
2026-09-15 7.06 14.11 0.46 26.48
2026-09-14 7.09 14.7 0.47 28.17
2026-09-11 7.55 13.25 0.45 25.69
2026-09-10 7.27 8.04 0.36 11.86
2026-09-09 7.38 16.89 0.51 33.6
2026-09-08 7.7 11.03 0.41 23.72
2026-09-07 7.63 16.23 0.5 32.14
2026-09-04 7.63 17.64 0.52 35.18
2026-09-03 7.65 22.7 0.6 48.62
2026-09-02 7.58 41.63 0.92 86.96
2026-09-01 7.73 20.15 0.56 42.06
2026-08-31 7.71 16.6 0.5 34.26
2026-08-28 7.77 23.37 0.62 51.59
2026-08-27 7.9 17.08 0.51 35.71
2026-08-26 7.94 23.83 0.62 53.57
2026-08-25 7.85 18.15 0.53 38.49
2026-08-24 7.8 22.76 0.61 49.8
2026-08-21 7.9 19.34 0.55 42.86
2026-08-20 7.75 23.2 0.61 51.98
2026-08-19 7.91 22.59 0.6 50.4
2026-08-18 7.88 25.15 0.64 55.95
2026-08-17 8.14 37.58 0.85 81.27
2026-08-14 8.35 44.3 0.96 90.87
2026-08-13 7.82 23 0.61 52.38
2026-08-12 7.78 17.91 0.52 41.27
2026-08-11 7.72 39.03 0.88 84.13
2026-08-10 7.99 33.54 0.78 74.5
2026-08-07 8.68 20.79 0.57 49.21
2026-08-06 8.73 20.47 0.57 49.21
2026-08-05 8.86 38.96 0.87 84.13
2026-08-04 9.12 30.05 0.73 67.06
2026-08-03 8.91 48.81 1.04 95.62
2026-07-31 8.65 44 0.96 90.87
2026-07-30 8.43 50.78 1.07 97.22
2026-07-29 8.14 37 0.84 82.14
2026-07-28 8.4 51.22 1.08 97.62
2026-07-27 8.52 46.54 1 94.42
2026-07-24 8.42 41.71 0.92 90.08
2026-07-23 8.41 37.58 0.85 85.32
2026-07-22 8.54 40.91 0.91 89.29
2026-07-21 8.62 44.2 0.96 92.46
2026-07-20 8.48 46.44 1 94.42
2026-07-17 8.62 40.51 0.9 89.29
2026-07-16 8.7 39.58 0.88 88.49
2026-07-15 8.62 42.38 0.93 91.67
2026-07-14 8.66 40.91 0.91 90.48