diff --git a/MEV_by_chains/MEV_on_Ethereum/shangai.md b/MEV_by_chains/MEV_on_Ethereum/shangai.md
new file mode 100644
index 0000000..a8e90d8
--- /dev/null
+++ b/MEV_by_chains/MEV_on_Ethereum/shangai.md
@@ -0,0 +1,21 @@
+## shangai updates
+
+<br>
+
+### tl; dr
+
+<br>
+
+* WARM coinbase: reduce fees paid by builders (26x lower?), high-volume trading savings
+
+
+
+<br>
+
+---
+
+### resources
+
+<br>
+
+* [shangai updates and warm fees, by min](https://www.livemint.com/market/cryptocurrency/ethereum-insiders-to-get-fee-cuts-that-others-won-t-in-upgrade-11667749979740.html)