According to figures from Dealogic, â¬18.4 billion ($23.1 billion) worth of bonds were sold â up on the â¬4.8 billion recorded the week before.
The likes of BNP Paribas, Barclays and HSBC were among the banks involved with the issues, reports the Financial Times.
Myles Clarke, head of the bond syndicate desk at Royal Bank of Scotland, said that such firms are looking to make the most of improving investor sentiment before the stress test results come out.
"There's such an overhang of issuance that needs to get done this year that if last week's deals continue to perform well, you'll see bank after bank coming to this market," he added.
Last week, the EU confirmed that 91 banks will have the results of stress tests conducted upon them made public.
By Tony Aynsley