diff --git a/src/routes/articles.js b/src/routes/articles.js
index a738131..66596bf 100644
--- a/src/routes/articles.js
+++ b/src/routes/articles.js
@@ -284,8 +284,8 @@ router.get('/:id/mensuel', async (req, res) => {
         SUM(MntMvtHt)      AS ca_ht,
         SUM(MntMvtTTC)     AS ca_ttc,
         SUM(MargeMvt)      AS marge,
-        CASE WHEN SUM(MntMvtTTC) > 0
-          THEN ROUND(SUM(MargeMvt) / SUM(MntMvtTTC) * 100, 2)
+        CASE WHEN SUM(MntMvtHt) != 0
+          THEN ROUND(SUM(MargeMvt) / ABS(SUM(MntMvtHt)) * 100, 2)
           ELSE 0 END       AS taux_marge
       FROM MvtArt
       WHERE ArtNoId = $1
diff --git a/src/routes/performance.js b/src/routes/performance.js
index b897506..711f438 100644
--- a/src/routes/performance.js
+++ b/src/routes/performance.js
@@ -21,8 +21,8 @@ router.get('/ca', async (req, res) => {
         SUM(MntMvtHt) AS CA_HT,
         SUM(MntMvtTTC) AS CA_TTC,
         SUM(MargeMvt) AS MARGE,
-        CASE WHEN SUM(MntMvtTTC) > 0
-          THEN ROUND(SUM(MargeMvt) / SUM(MntMvtTTC) * 100, 2)
+        CASE WHEN SUM(MntMvtHt) != 0
+          THEN ROUND(SUM(MargeMvt) / ABS(SUM(MntMvtHt)) * 100, 2)
           ELSE 0 END AS TAUX_MARGE
       FROM MvtArt
       WHERE GenreMvt = 3
diff --git a/src/routes/stock.js b/src/routes/stock.js
index a3b0b31..81d8ea9 100644
--- a/src/routes/stock.js
+++ b/src/routes/stock.js
@@ -155,8 +155,8 @@ router.get('/article/:id/periode', async (req, res) => {
         SUM(MntMvtHt) AS ca_ht,
         SUM(MntMvtTTC) AS ca_ttc,
         SUM(MargeMvt) AS marge,
-        CASE WHEN SUM(MntMvtTTC) > 0
-          THEN ROUND(SUM(MargeMvt) / SUM(MntMvtTTC) * 100, 2)
+        CASE WHEN SUM(MntMvtHt) != 0
+          THEN ROUND(SUM(MargeMvt) / ABS(SUM(MntMvtHt)) * 100, 2)
           ELSE 0 END AS taux_marge,
         MIN(DatMvt) AS premiere_vente,
         MAX(DatMvt) AS derniere_vente