diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index d1ac47df4..d17b442ab 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -2887,7 +2887,7 @@ class Exchange:
             else:
                 # Fill up missing funding_rate candles with fallback value
                 combined = mark_rates.merge(
-                    funding_rates, on='date', how="outer", suffixes=["_mark", "_fund"]
+                    funding_rates, on='date', how="left", suffixes=["_mark", "_fund"]
                     )
                 combined['open_fund'] = combined['open_fund'].fillna(futures_funding_rate)
                 return combined
diff --git a/tests/exchange/test_exchange.py b/tests/exchange/test_exchange.py
index 168cf512d..34d4ca4c6 100644
--- a/tests/exchange/test_exchange.py
+++ b/tests/exchange/test_exchange.py
@@ -4314,8 +4314,8 @@ def test_combine_funding_and_mark(
         assert len(df) == 1
 
     # Empty funding rates
-    funding_rates = DataFrame([], columns=['date', 'open'])
-    df = exchange.combine_funding_and_mark(funding_rates, mark_rates, futures_funding_rate)
+    funding_rates2 = DataFrame([], columns=['date', 'open'])
+    df = exchange.combine_funding_and_mark(funding_rates2, mark_rates, futures_funding_rate)
     if futures_funding_rate is not None:
         assert len(df) == 3
         assert df.iloc[0]['open_fund'] == futures_funding_rate
@@ -4324,6 +4324,12 @@ def test_combine_funding_and_mark(
     else:
         assert len(df) == 0
 
+    # Empty mark candles
+    mark_candles = DataFrame([], columns=['date', 'open'])
+    df = exchange.combine_funding_and_mark(funding_rates, mark_candles, futures_funding_rate)
+
+    assert len(df) == 0
+
 
 @pytest.mark.parametrize('exchange,rate_start,rate_end,d1,d2,amount,expected_fees', [
     ('binance', 0, 2, "2021-09-01 01:00:00", "2021-09-01 04:00:00",  30.0, 0.0),