A 10-year, 3.5% fixed-rate USD-denominated bullet bond issued by Bank TBT, which has an A- credit rating and no embedded options, makes semi-annual coupon payments and has 4.5 years remaining until it matures. Given the bond's yield to maturity is 4.67%, determine the interpolated spread (i-spread). Use the following data for comparison:

• The closest-maturity on-the-run Treasury note's yield: 1.15%
• 4-year Treasury note's yield: 1.65%
• 5-year Treasury note's yield: 2.08%
• Linearly interpolated 4.5-year swap rate: 1.94%
• Z-spread: 316 basis points