The yield spread between the 10-year Greek and German benchmark bonds widened to 16.32 pct in the domestic electronic secondary bond market, from 16.06 pct on Monday, with the Greek bond yielding 18.02 pct and the German Bund 1.70 pct. There was no turnover in the market. In interbank markets, interest rates moved slightly higher. The 12-month rate was 2.08 pct, the six-month rate 1.75 pct, the three-month rate 1.55 pct and the one-month rate 1.35 pct.