day OI</th></tr></thead><thead><tr><th>Month</th><th>Open</th><th>High</th><th>Low</th><th>Last</th><th>Change</th><th>Settle</th><th>Est. Volume</th><th>Prior day OI</th></tr></thead><tbody><tr><td>SEP 21</td><td>-</td><td>-</td><td>-</td><td>-</td><td>+.01500</td><td>2.41500</td><td>0</td><td>5,387</td></tr><tr><td>OCT 21</td><td>-</td><td>-</td><td>-</td><td>-</td><td>+.05000</td><td>2.14000</td><td>442</td><td>7,607</td></tr><tr><td>NOV 21</td><td>-</td><td>-</td><td>-</td><td>-</td><td>+.05000</td><td>