Coinstar Inc., owner of the Redbox movie-rental kiosks, fell 2.3 percent to close at $52.95 yesterday on reports that some of Hollywood’s largest movie studios may try to lengthen the current 28-day limit on DVD rentals to 60 days.

The company fell another 10.2 percent in extended trading after saying it will raise DVD prices to reflect rising debit card fees and issuing a forecast that fell short of analysts’ estimates.

Coinstar is raising its DVD rental price by 20 cents to $1.20, effective Oct. 31, to counter rising expenses, including higher debit-card fees imposed by Congress.

Blu-ray and video-game prices won’t change, the company said. Fourth-quarter profit from continuing operations will be 57 cents to 67 cents a share, Coinstar said yesterday in a statement. That is below the 78-cent average of 14 analysts estimates compiled by Bloomberg News.

Redbox is the largest operator of DVD dispensers, with 33,300 machines as of Sept. 29.