Magnificent Seven member Apple has seen its stock come under pressure in recent weeks. As Wall Street tries to predict the trough, Morgan Stanley thinks there may be more room to go lower before the stock reaches its lowest point. Apple shares are down 14% after peaking in mid-July. The stock began declining sharply after the company's fiscal third-quarter earnings release , in which it forecast a fall in revenue in the September quarter. Apple also reported that overall sales fell 1% as iPhone, iPad and Mac sales weakened. While the company officially released the iPhone 15 line on Sept….