The San Diego Stock Exchange Index closed lower Tuesday at 138.78, down 0.30 percent from Monday. Declining issues beat advancers 53 to 50, and 137 issues were unchanged. Realty Income Corp. (NYSE: O) was the top dollar gainer, up 87 cents to $44.50. Cubic Corp. (NYSE: CUB) was the top dollar loser, down $3.40 to $45. For the complete, updated San Diego Stock Exchange Index visit sddt.com/stocks.