Management at U2 have declined to comment on reports in the Italian media that Bono has shelled out millions of euro on a luxury yacht.
The 48-year-old singer, one of the world's best-known humanitarians and leading charity activists, is understood to have bought the yacht, built by the respected Codecasa firm of central Italy, after a "test cruise" with his family.
Until recently, the Cyan had a weekly charter price of between €140,000 and €175,000. It had an estimated asking price of over €15m.
"We don't comment on the private lives of band members," a spokesperson for the band said in replies to queries about the yacht yesterday.
Bono, his wife Ali Hewson, and their children were on holiday on the yacht last year, and were photographed disembarking when it docked in Naples in August 2007.
The 140-foot vessel has six cabins and room for 12 guests to sleep comfortably. Among its features are a large deck space, a Jacuzzi dip pool, a large swimming platform and a garage for holding "watersport toys".
The interior is constructed with mahogany and limed oak, with each of the rooms fitted with plasma screen tvs, satellite TV, and dvd players.
According to the reports in the Italian media, Bono has repainted the yacht in blue and has an expensive new stereo system fitted. The sale price, however, is not known, with some speculation that it might top €20m.
Even that would be unlikely to put too much pressure on the Dubliner's bank account, however, as he has an estimated personal wealth approaching €200m.
U2 has sold more than 140 million albums worldwide and will release a new album early next year.
Codecasa, who were founded in 1825 and started out making wooden boats, built the yacht in 1997 for a group of European ship owners and it was extensively refitted in 1999.
The Italian yacht-maker has sold yachts in the past to famous names such as fashion designers Giorgio Armani, Domenico Dolce and Stefano Gabbana.
Giorgio Armani's yacht, the Mariu, is 210-feet long and when not in use he rents it out with a price tag of €180,000 per week.