Funso (Chichewa): Tsiku liti lomwe NITL inagulitsa pa mtengo wokwera kwambiri? 
Question (English): On which date did NITL record its highest traded bid price?
Table: mse_daily (difficulty: easy)
SQL: SELECT trade_date, MAX(bid_price) AS max_bid_price FROM mse_daily WHERE ticker = 'NITL' AND bid_price > 0;
Result: [('2025-09-10', 1922.0)]