diff --git a/kotlin/121-Best-Time-to-Buy-and-Sell-Stocks.kt b/kotlin/121-Best-Time-to-Buy-and-Sell-Stocks.kt
new file mode 100644
index 000000000..fcdfb05cb
--- /dev/null
+++ b/kotlin/121-Best-Time-to-Buy-and-Sell-Stocks.kt
@@ -0,0 +1,11 @@
+class Solution {
+    fun maxProfit(prices: IntArray): Int {
+        var buy = prices[0]
+        var maxDiff = 0
+        for (i in 1 until prices.size) {
+            buy = buy.coerceAtMost(prices[i])
+            maxDiff = maxDiff.coerceAtLeast(prices[i] - buy)
+        }
+        return maxDiff
+    }
+}