Both the rumor mill and heavy stock trading point to the possibility that

Arden Realty

(ARI) - Get Report

, one of Southern California's largest office owners, may become the next real estate investment trust to go private.

The rumor was first published by Barry Vinocur, a veteran REIT industry watcher, in his REIT Newshound note late Thursday.

Vinocur cited an unnamed source who said an announcement is reportedly imminent on a deal that would take Los Angeles-based Arden private. The deal would involve a breakup privatizing Arden, with one or two public REITs also taking pieces of the company, he wrote.

After barely moving for the past month, Arden shares rose 4.5% Thursday to $40.40, with heavy trading volume.

It isn't the first time that Arden has been the subject of buyout speculation. "Management has always indicated there is a price at which to sell," one major institutional investor in the company told

TheStreet.com

.

Arden didn't return a call seeking comment.

Industry watchers expect more REITs might go private since share prices in the sector have taken a beating recently on interest rate fears.

This year,

Capital Automotive

(CARS) - Get Report

,

Gables Residential

( GBP), and

CRT Properties

( CRO) all approved plans to go private and investors were rewarded with premiums that ranged from 9% to 15%.