TradingKey – On August 10, Eastern Time, Apple’s (AAPL) stock price has been hovering around $300 since its quarterly earnings report was released. However, Wall Street’s bearish sentiment toward Apple is accelerating.

In its latest research report, Jefferies downgraded Apple to an “Underperform” rating and lowered its price target from $285.56 to $263.66, representing about 14% downside from the current stock price of $306.

Jefferies analyst Edison Lee pointed out that supply chain checks show Apple has canceled its 20th-anniversary all-glass iPhone model due to poor production yields. He believes this signal indicates that Apple’s difficulty in raising the iPhone’s average selling price (ASP) by introducing a new form factor is far…