Added whatsnew note

Author: jhendricks487

Diff for: doc/source/whatsnew/v3.0.0.rst

@@ -151,10 +151,23 @@ These improvements also fixed certain bugs in groupby:
 - :meth:`.DataFrameGroupBy.sum` would have incorrect values when there are multiple groupings, unobserved groups, and non-numeric data (:issue:`43891`)
 - :meth:`.DataFrameGroupBy.value_counts` would produce incorrect results when used with some categorical and some non-categorical groupings and ``observed=False`` (:issue:`56016`)
 
-.. _whatsnew_300.notable_bug_fixes.notable_bug_fix2:
+.. _whatsnew_300.notable_bug_fixes.corr_bounded:
 
-notable_bug_fix2
-^^^^^^^^^^^^^^^^
+Improved handling of numerical precision errors in ``DataFrame.corr``
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Fixed an issue in :meth:`.DataFrame.corr` where numerical precision errors could cause correlation values to
+exceed 1.0 when dealing with data having very small variances. Correlation coefficients are now properly
+bounded to the valid range of [-1.0, 1.0] (:issue:`61120`).
+
+Previously, the code below would return ``1.1547005383792517``. It now returns ``1.0`` as expected.
+
+.. ipython:: python
+
+    data = pd.DataFrame(dict(
+        x=[0, 1],
+        y=[1.35951, 1.3595100000000007]
+    ))
+    data.corr().max().max()
 
 .. ---------------------------------------------------------------------------
 .. _whatsnew_300.api_breaking: