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State Street SPDR S&P Biotech XBI 156.24 -2.01 -1.27%

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

XBI / Comparative study

3 signals / 503 sessions
Window statistics

Signal snapshot

Current value vs. selected history
IV Rank z 0.92
50.81
Mean
33.71
Window
+48.3%
ATM IV z 0.11
0.3
Mean
0.3
Window
+11.2%
IV Percentile z -0.27
48.81
Mean
55.99
Window
+73.3%
Relationship matrix

Correlation

Pearson r
Signal IV Rank ATM IV IV Percent...
IV Rank 1.00 0.76 0.69
ATM IV 0.76 1.00 0.83
IV Percent... 0.69 0.83 1.00
Source observations

Data inspector

1-50 of 503
  • 1 / 11
Date Close IV Rank ATM IV IV Percentile
2026-09-18 156.24 50.81 0.3 48.81
2026-09-17 158.25 56.12 0.32 72.22
2026-09-16 154.18 56.74 0.32 74.6
2026-09-15 154.03 55.78 0.32 72.62
2026-09-14 157.6 46.16 0.29 21.91
2026-09-11 156.2 42.65 0.28 9.13
2026-09-10 156.82 49.3 0.3 40.87
2026-09-09 159.38 49.02 0.3 40.48
2026-09-08 161.93 48.67 0.3 38.89
2026-09-07 163.4 52.94 0.31 60.56
2026-09-04 163.81 48.5 0.3 37.7
2026-09-03 164.38 54.08 0.31 65.87
2026-09-02 165.37 52.7 0.31 59.13
2026-09-01 163.4 51.4 0.3 52.59
2026-08-31 162.5 50.73 0.3 50.8
2026-08-28 162.38 48.22 0.3 37.45
2026-08-27 168.23 53.42 0.31 62.95
2026-08-26 168.39 52.38 0.31 58.17
2026-08-25 169.1 56.91 0.32 74.9
2026-08-24 164.17 55.06 0.32 70.8
2026-08-21 165.73 55.19 0.32 71.31
2026-08-20 163.38 57.37 0.32 77.69
2026-08-19 169.55 51.65 0.31 56.57
2026-08-18 160.11 46.96 0.29 32.67
2026-08-17 159.53 44.7 0.28 22.4
2026-08-14 157.41 42.76 0.28 17.13
2026-08-13 156.86 46.16 0.29 29.48
2026-08-12 159.39 42.32 0.28 16.73
2026-08-11 158.07 52.83 0.31 62.55
2026-08-10 158.03 54.09 0.31 67.6
2026-08-07 157.37 54.69 0.32 69.72
2026-08-06 154.5 56.56 0.32 74.9
2026-08-05 153.01 60.93 0.33 86.85
2026-08-04 151.88 64.11 0.34 91.24
2026-08-03 147.31 67.14 0.35 94.8
2026-07-31 147.01 58.16 0.33 80.48
2026-07-30 151.46 60.36 0.33 86.85
2026-07-29 147.91 56.57 0.32 77.29
2026-07-28 149.78 55.49 0.32 75.7
2026-07-27 150.59 57.7 0.32 80.4
2026-07-24 150.48 50.09 0.3 56.18
2026-07-23 152.23 56.97 0.32 78.09
2026-07-22 152.11 52.83 0.31 67.33
2026-07-21 154.5 53.01 0.31 68.13
2026-07-20 150.94 52.63 0.31 66.8
2026-07-17 154.26 53.06 0.31 68.92
2026-07-16 152 52.8 0.31 67.73
2026-07-15 156.22 52.09 0.31 65.74
2026-07-14 155.45 53.84 0.31 71.31
2026-07-13 155.34 57.42 0.32 80.4