The pan-European STOXX 600 index, which spent most of the morning trading unchanged, accelerated losses from that point and was down 1.3% at 1457 GMT.
Data on Monday showed 80 billion euros worth of bonds was purchased under the ECB’s PEPP emergency stimulus scheme in April, the first full month after the higher pace was announced in March.
Among euro zone issuers, Greece hired a syndicate of banks for a new five-year bond sale, according to a lead manager memo seen by Reuters.