The European Central Bank was seen buying Italian bonds again on Tuesday afternoon after an auction of 10-year BTPs met relatively weak demand earlier in the day.
  The ECB had already stepped in shortly after the auction and bought what traders described as significant amounts of 10-year paper.
  "Central banks are continuing to buy (on behalf of the ECB), especially on the 10-year maturity but also on the 5-year one," one trader said.