diff --git a/src/app/api/markets/binance.py b/src/app/api/markets/binance.py
index 2206157..f2b1ce8 100644
--- a/src/app/api/markets/binance.py
+++ b/src/app/api/markets/binance.py
@@ -57,7 +57,9 @@ class BinanceWrapper(MarketWrapper):
         """
         Formatta l'asset_id nel formato richiesto da Binance.
         """
-        return asset_id.replace('-', '') if '-' in asset_id else f"{asset_id}{self.currency}"
+        i = asset_id.index('-')
+        if i != -1: asset_id = asset_id[:i]
+        return f"{asset_id}{self.currency}" if self.currency not in asset_id else asset_id
 
     def get_product(self, asset_id: str) -> ProductInfo:
         symbol = self.__format_symbol(asset_id)
diff --git a/src/app/api/markets/coinbase.py b/src/app/api/markets/coinbase.py
index 194bf22..2397e38 100644
--- a/src/app/api/markets/coinbase.py
+++ b/src/app/api/markets/coinbase.py
@@ -61,7 +61,9 @@ class CoinBaseWrapper(MarketWrapper):
         )
 
     def __format(self, asset_id: str) -> str:
-        return asset_id if '-' in asset_id else f"{asset_id}-{self.currency}"
+        i = asset_id.index('-')
+        if i != -1: asset_id = asset_id[:i]
+        return f"{asset_id}-{self.currency}"
 
     def get_product(self, asset_id: str) -> ProductInfo:
         asset_id = self.__format(asset_id)
diff --git a/src/app/api/markets/yfinance.py b/src/app/api/markets/yfinance.py
index 579b591..4a5e889 100644
--- a/src/app/api/markets/yfinance.py
+++ b/src/app/api/markets/yfinance.py
@@ -47,8 +47,9 @@ class YFinanceWrapper(MarketWrapper):
         Formatta il simbolo per yfinance.
         Per crypto, aggiunge '-' e la valuta (es. BTC -> BTC-USD).
         """
-        asset_id = asset_id.upper()
-        return f"{asset_id}-{self.currency}" if '-' not in asset_id else asset_id
+        i = asset_id.index('-')
+        if i != -1: asset_id = asset_id[:i]
+        return f"{asset_id}-{self.currency}"
 
     def get_product(self, asset_id: str) -> ProductInfo:
         symbol = self._format_symbol(asset_id)