diff --git a/lbry/lbry/wallet/server/db/trending.py b/lbry/lbry/wallet/server/db/trending.py
index bf02aad90..3ec0562b5 100644
--- a/lbry/lbry/wallet/server/db/trending.py
+++ b/lbry/lbry/wallet/server/db/trending.py
@@ -39,7 +39,8 @@ class ZScore:
 
     @property
     def standard_deviation(self):
-        return sqrt((self.power / self.count) - self.mean ** 2)
+        value = (self.power / self.count) - self.mean ** 2
+        return sqrt(value) if value > 0 else 0
 
     def finalize(self):
         if self.count == 0:
diff --git a/lbry/tests/unit/wallet/server/test_sqldb.py b/lbry/tests/unit/wallet/server/test_sqldb.py
index 87dcc3bea..e313863bc 100644
--- a/lbry/tests/unit/wallet/server/test_sqldb.py
+++ b/lbry/tests/unit/wallet/server/test_sqldb.py
@@ -477,3 +477,9 @@ class TestTrending(TestSQLDB):
         self.assertEqual([53, 38, -32, 0, -6], [int(c['trending_global']) for c in results])
         self.assertEqual([4, 4, 2, 0, 1], [int(c['trending_group']) for c in results])
         self.assertEqual([53, 38, 2, 0, -6], [int(c['trending_mixed']) for c in results])
+
+    def test_edge(self):
+        problematic = self.get_stream('Problem', COIN)
+        self.advance(1, [problematic])
+        self.advance(TRENDING_WINDOW, [self.get_support(problematic, 53000000000)])
+        self.advance(TRENDING_WINDOW * 2, [self.get_support(problematic, 500000000)])