Index: server/db/schema_creation.sql
===================================================================
--- server/db/schema_creation.sql	(revision 9577c7944ff24ddc9145ff6637494f07d87c3dd4)
+++ server/db/schema_creation.sql	(revision a531b45df67bdc814d08013102302eda333cc626)
@@ -261,5 +261,4 @@
     avg_price            numeric,
     market_return_pct    numeric,
-    price_volatility     numeric,
     participating_users  bigint
 )
@@ -281,5 +280,4 @@
             COUNT(*)         AS trade_count,
             AVG(price)       AS avg_price,
-            STDDEV(price)    AS price_volatility,
             MAX(first_price) AS first_price,
             MAX(last_price)  AS last_price
@@ -300,5 +298,4 @@
         ROUND(ms.avg_price, 6)                                                            AS avg_price,
         ROUND((ms.last_price - ms.first_price) / NULLIF(ms.first_price, 0) * 100, 2)      AS market_return_pct,
-        ROUND(COALESCE(ms.price_volatility, 0), 6)                                        AS price_volatility,
         COALESCE(p.participating_users, 0)                                                AS participating_users
     FROM market_stats ms