The frenzy surrounding the release of a new iphone hit Wall Street on Friday, pushingApple Inc.’s stock to an all-time high — even though there has been no official product announcement or launch date from the company.

Shares closed at $648.11, up nearly 1.9%. They’re up more than 22% since May, when iPhone 5 rumors began to swell.

The stock surge comes ahead of a widely expected new iPhone rumored to be unveiled Sept. 12 in San Francisco, with the smartphone expected to hit store shelves a couple of weeks later.

Based on recent checks with Apple’s Asian suppliers and images purportedly showing the revamped device, technology analysts say they expect a handset with a larger screen, high-speed 4G LTE connectivity, a better camera, faster processors and a smaller dock connector.

Wall Street has also been buzzing with speculation that Apple may introduce a smaller, 7.85-inch ipad to compete with rival tablets such as  . And there’s a rumor that Apple might also introduce an iTV television set, although most analysts say they think a TV announcement won’t happen until later this year or next year.

“We continue to believe that a smaller form factor iPad is indeed imminent,” Barclays analyst Ben A. Reitzes said this week in a note to investors. “We believe that a smaller iPad will combine the ease of use expected of Apple products with high-performance hardware in a size that is more conducive as a companion device, remote, e-book or game player.”

Peter Misek, a managing director at Jefferies, raised his price target for Apple shares to $900 from $800 on Friday and said he expected the iPhone 5 to be “the biggest handset launch in history.”