Alpine Realty Income & Growth ( AIGYX) is up 13.2% this year, including a 6.3% gain over the past three months. It invests primarily in real estate investment trusts (REITs). Its largest holding, Simon Property Group ( SPG), at 6.5% of the fund, has jumped 16.4% this year. The company is the largest retail REIT in the U.S., and its portfolio includes shopping malls, premium outlet centers and international properties. Its holdings recently included 393 properties, about half of which were wholly owned. Boston Properties ( BXP), which makes up 5.6% of the fund, has risen 24.6% this year. It owns over 100 office buildings in major cities as well as at least 20 office and technical properties, a hotel, as well as residential and retail properties. Vornado Realty Trust ( VNO), at 5% of the fund, is up 13.6% this year. It owns mostly office properties in New York and Washington D.C., and shopping malls and retail properties nationwide.