S. 147 : Reassessment-After the expiry of four years-Change of opinion-Excess investment in shares-Where reasons for reopening were based entirely on financial statements already on record during the original assessment, it amounted to a mere change of opinion and was not sustainable as there was no failure on the part of the assessee to disclose material facts fully and truly. [S. 14A, 69, 148, Art. 226]