The Casablanca Stock Exchange began trading on Tuesday with a downturn, reversing gains made in the previous session. The primary MASI index fell by 0.1 percent, closing at 18,372.12 points. This follows a 0.21 percent increase on Monday. Sector indicators showed mixed performance, with the MASI.20 index, tracking the 20 largest listed companies, rising by 0.17 percent. The overall market shift indicates a period of correction following recent positive momentum. Further details regarding specific sector performances were not immediately available. The exchange’s performance is being closely watched by investors and analysts.