1359 GMT - The European Central Bank remains the largest single investor in the euro investment-grade credit market, LBBW's Matthias Schell says in a note. The size of ECB's corporate bond holdings has reduced gradually over the past three years after it stopped purchasing corporate bonds in 2023. The holdings have also declined as bonds mature. As at the end of August, the ECB held 253.6 billion euros in euro IG bonds bought during previous periods of quantitative easing, down from a peak of 390 billion euros in 2023, Schell says.