Benchmark Real Estate Group sold the building housing the Prada store at 2 Newtown Lane in East Hampton for $10.25 million.

The roughly 4.4-acre property has about 260 feet of frontage on Hook Pond and overlooks the Maidstone Club.

Wall Street bonuses surged 31% last year on rising markets and a rebound in dealmaking activity, delivering a boon for the industry’s hometown economy. Some are already wondering how long it is going ...