Until 1946, residents of the island of Yap used large doughnut-shaped stones as financial assets. Although prices of goods and services were not quoted in terms of the stones, the stones were often used in exchange for particularly large purchases, such as livestock. To make the transaction, several individuals would insert a large stick through a stone's center and carry it to its new owner. A stone was difficult for any one person to steal, so an owner typically would lean it against the side of his or her home as a sign to others of accumulated purchasing power that would hold value for later use in exchange. Loans would often be repaid using the stones. In what ways did these stones function as money?