Mumbai: While sending money back home, the speed and efficiency of transfer are uppermost on the mind of overseas Indians, as they predominantly use electronic wires and Swift for remittances, according to a study by the Reserve Bank of India (RBI). The Society for Worldwide Interbank Financial Telecommunication (Swift) supplies secure messaging services. Each financial institution has a Swift code which is commonly used to identify the banks involved in an international wire transfer. Despite being the costliest mode, Swift is used frequently. The charge for sending $500 could be around five percent of the amount. Perhaps sending money "in time" is the top-most priority since close to 61 percent of remittance amount is used to take care of family expenses. On an average, about 20 percent of the funds received were deposited in bank accounts and four percent invested in land/property/equity shares, the study said. Besides efficiency factor, the wider network of Indian bank branches abroad offering electronic fund transfer facilities is seen to influence the decision to use a particular channel.