Casper Landsten-Thirty Days Later. Casper Landsten once again has $1.1 million (or its Swiss franc equivalent) to invest for three months. He now faces the following rates. Should he enter into a covered interest arbitrage (CIA) investment? $ Arbitrage funds available Spot exchange rate (SFr/S) 3-month forward rate (SFr/S) U.S. Dollar annual interest rate Swiss franc annual interest rate 1,100,000 1.3391 1.3282 4.753 % 3.629 % yielding currency, the The CIA profit potential is %, which tells Casper Landsten he should borrow and invest in the months locking in a CIA profit. (Round to three decimal places and select from the drop-down menus.) and then sell the principal and interest forward three