Funso (Chichewa): Mtengo wapakatikati wotsekera msika wa NBS Bank ndi uti?
Question (English): What is the average closing price of NBS Bank?
Table: mse_daily (difficulty: easy)
SQL: SELECT AVG(close_price) FROM mse_daily WHERE company_name = 'NBS Bank';
Result: [(137.57971563981044,)]