Shares in six Southern California-based real estate investment trusts received a boost Wednesday after two local trusts were upgraded from “hold” to “buy” by Deutsche Bank.

Santa Monica-based Macerich Co. gained $2.15 per share, or 2.5 percent, after the upgrade, to $88.54. Kilroy Reality Corp. was also upgraded, helping the Los Angeles-based firm gain $1.90 per share, or 2.6 percent, to $74.24.

“We think [this] halts what we saw as the indiscriminate shorting of the stocks simply because of subprime noise in the apartment sector or because the technicals were deteriorating. Instead, we believe the deal suggests that any short position is vulnerable to a privatization announcement at virtually any time,” the report from Deutsche said.

Though not included in the upgrade, shares in Glendale-based Public Storage Inc. got a 4.6 percent boost Wednesday to $89.06 while Long Beach-based Health Care Property Investors Inc. also gained 97 cents, or 3.1 percent, to $33.01 in afternoon trading.

Also benefiting were Los Angeles-based Maguire Properties Inc., which gained 74 cents, or 2.1 percent, to $36.19 and Pasadena-based Alexandria Real Estate Equities Inc., which gained $1.07 to $104.69.