S. 147 Reassessment – With in four years- Change of opinion –Survey – Penny stock – Alleged bogus business loss – AO had specifically examined the assessee’s loss in shares of Shree Nath Commercial and Finance Ltd- Reopening was subsequently based on the very same survey material, Kolkata Investigation Wing report on penny stocks, and the same disclosed transactions, the reopening was invalid as being founded merely on a change of opinion – Notice u/s 148 and reassessment quashed . [S. 14A, 133A, 143(2), 142(1), 143(3), 148]