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HealthStream Inc HSTM 29.23 0.04 0.15%

Previous-day view · Fri Sep 18 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

HSTM / Comparative study

3 signals / 502 sessions
Window statistics

Signal snapshot

Current value vs. selected history
IV Rank z -0.16
11.63
Mean
13.94
Window
+459.1%
ATM IV z -0.33
0.63
Mean
0.88
Window
+169.0%
IV Percentile z 0.52
63.75
Mean
48.63
Window
+192.0%
Relationship matrix

Correlation

Pearson r
Signal IV Rank ATM IV IV Percent...
IV Rank 1.00 0.95 0.75
ATM IV 0.95 1.00 0.77
IV Percent... 0.75 0.77 1.00
Source observations

Data inspector

1-50 of 502
  • 1 / 11
Date Close IV Rank ATM IV IV Percentile
2026-09-18 29.23 11.63 0.63 63.75
2026-09-17 29.19 0.89 0.16 1.2
2026-09-16 29.42 9.95 0.63 62.95
2026-09-15 29.65 2.69 0.25 3.19
2026-09-14 29.63 12.78 0.78 73.2
2026-09-11 29.11 16.84 0.99 82.07
2026-09-10 28.88 15.11 0.9 79.28
2026-09-09 28.67 13.64 0.82 76.49
2026-09-08 28.72 13.03 0.79 74.9
2026-09-07 29.2 4.57 0.35 15.6
2026-09-04 29.2 3.75 0.31 8.76
2026-09-03 29.74 3.61 0.3 7.57
2026-09-02 29.77 3.6 0.3 7.17
2026-09-01 29.67 4.47 0.34 13.2
2026-08-31 29.05 7.39 0.5 49
2026-08-28 29.38 12.99 0.79 72.4
2026-08-27 28.83 5.52 0.4 23.2
2026-08-26 28.76 5.51 0.4 22.8
2026-08-25 28.87 14.3 0.86 74.8
2026-08-24 28.78 13.94 0.84 73.49
2026-08-21 28.87 9.03 0.58 56
2026-08-20 28.59 13.07 0.79 71.6
2026-08-19 28.55 8.04 0.53 52
2026-08-18 28.51 13.48 0.81 72
2026-08-17 28.02 8.93 0.58 55.82
2026-08-14 28.94 7.96 0.53 51.2
2026-08-13 29.02 8.04 0.53 52.4
2026-08-12 28.36 9.27 0.59 56.4
2026-08-11 28.36 11.2 0.69 63.6
2026-08-10 29.37 7.81 0.52 51.81
2026-08-07 28.72 6.89 0.47 44.4
2026-08-06 28.12 9.58 0.61 56.4
2026-08-05 28.01 11.41 0.71 64.8
2026-08-04 29.8 17.03 1 74.8
2026-08-03 28.33 8.24 0.54 53.01
2026-07-31 28.04 7.08 0.48 46
2026-07-30 28.2 7.54 0.5 49.2
2026-07-29 29.53 6.75 0.46 41.2
2026-07-28 28.85 6.13 0.43 30.8
2026-07-27 27.87 6.78 0.46 41.37
2026-07-24 27.14 5.91 0.42 28.8
2026-07-23 26.39 6.67 0.46 38
2026-07-22 26.89 9.85 0.62 54.4
2026-07-21 27.84 14.91 0.89 68
2026-07-20 28.33 6.68 0.46 38.15
2026-07-17 28.48 6.19 0.43 32.4
2026-07-16 28.94 9.47 0.6 51.6
2026-07-15 28.25 39.73 2.18 92.4
2026-07-14 28.42 7.17 0.48 43.6
2026-07-13 28.72 6.09 0.43 30.12