diff --git a/bfxapi/rest/BfxRestInterface.py b/bfxapi/rest/BfxRestInterface.py
index 35153fc..0c02687 100644
--- a/bfxapi/rest/BfxRestInterface.py
+++ b/bfxapi/rest/BfxRestInterface.py
@@ -2,7 +2,7 @@ import requests
 
 from http import HTTPStatus
 
-from typing import List, Union, Literal, Optional
+from typing import List, Union, Literal, Optional, Any
 
 from . import serializers
 from .typings import *
@@ -135,4 +135,24 @@ class BfxRestInterface(object):
 
         data = self.__GET("liquidations/hist", params=params)
 
-        return [ serializers.Liquidation.parse(*subdata[0]) for subdata in data ]
\ No newline at end of file
+        return [ serializers.Liquidation.parse(*subdata[0]) for subdata in data ]
+
+    def leaderboards(
+        self,
+        resource: str, section: Literal["hist", "last"],
+        sort: Optional[int] = None, start: Optional[str] = None, end: Optional[str] = None, limit: Optional[int] = None
+    ) -> Union[Leaderboard, Leaderboards]:
+        params = { "sort": sort, "start": start, "end": end, "limit": limit }
+
+        data = self.__GET(f"rankings/{resource}/{section}", params=params)
+
+        if section == "last":
+            return serializers.Leaderboard.parse(*data)
+        return [ serializers.Leaderboard.parse(*subdata) for subdata in data ]
+
+    def funding_stats(self, symbol: str, start: Optional[str] = None, end: Optional[str] = None, limit: Optional[int] = None) -> FundingStats:
+        params = { "start": start, "end": end, "limit": limit }
+
+        data = self.__GET(f"funding/stats/{symbol}/hist", params=params)
+
+        return [ serializers.FundingStat.parse(*subdata) for subdata in data ]
\ No newline at end of file
diff --git a/bfxapi/rest/serializers.py b/bfxapi/rest/serializers.py
index 22817e0..a2f69df 100644
--- a/bfxapi/rest/serializers.py
+++ b/bfxapi/rest/serializers.py
@@ -13,7 +13,7 @@ class _Serializer(Generic[T]):
     def __serialize(self, *args: Any, skip: Optional[List[str]]) -> Iterable[T]:
         labels = list(filter(lambda label: label not in (skip or list()), self.__labels))
 
-        if len(labels) != len(args):
+        if len(labels) > len(args):
             raise BfxRestException("<labels> and <*args> arguments should contain the same amount of elements.")
 
         for index, label in enumerate(labels):
@@ -176,4 +176,32 @@ Liquidation = _Serializer[typings.Liquidation]("Liquidation", labels=[
     "PRICE_ACQUIRED"
 ])
 
+Leaderboard = _Serializer[typings.Leaderboard]("Leaderboard", labels=[
+    "MTS",
+    "_PLACEHOLDER",
+    "USERNAME",
+    "RANKING",
+    "_PLACEHOLDER",
+    "_PLACEHOLDER",
+    "VALUE",
+    "_PLACEHOLDER",
+    "_PLACEHOLDER",
+    "TWITTER_HANDLE"
+])
+
+FundingStat = _Serializer[typings.FundingStat]("FundingStat", labels=[
+    "TIMESTAMP",
+    "_PLACEHOLDER",
+    "_PLACEHOLDER",
+    "FRR",
+    "AVG_PERIOD",
+    "_PLACEHOLDER",
+    "_PLACEHOLDER",
+    "FUNDING_AMOUNT",
+    "FUNDING_AMOUNT_USED",
+    "_PLACEHOLDER",
+    "_PLACEHOLDER",
+    "FUNDING_BELOW_THRESHOLD"
+])
+
 #endregion
\ No newline at end of file
diff --git a/bfxapi/rest/typings.py b/bfxapi/rest/typings.py
index 5afc040..828c228 100644
--- a/bfxapi/rest/typings.py
+++ b/bfxapi/rest/typings.py
@@ -87,7 +87,7 @@ Candle = TypedDict("Candle", {
 Candles = List[Candle]
 
 DerivativesStatus = TypedDict("DerivativesStatus", {
-    "KEY": str,
+    "KEY": Optional[str],
     "MTS": int,
     "DERIV_PRICE": float,
     "SPOT_PRICE": float,
@@ -117,4 +117,25 @@ Liquidation = TypedDict("Liquidation", {
 
 Liquidations = List[Liquidation]
 
+Leaderboard = TypedDict("Leaderboard", {
+    "MTS": int,
+    "USERNAME": str,
+    "RANKING": int,
+    "VALUE": float,
+    "TWITTER_HANDLE": Optional[str]
+})
+
+Leaderboards = List[Leaderboard]
+
+FundingStat = TypedDict("FundingStat", {
+    "TIMESTAMP": int,
+    "FRR": float,
+    "AVG_PERIOD": float,
+    "FUNDING_AMOUNT": float,
+    "FUNDING_AMOUNT_USED": float,
+    "FUNDING_BELOW_THRESHOLD": float
+})
+
+FundingStats = List[FundingStat]
+
 #endregion
\ No newline at end of file