Americans are gearing up for Sunday’s Super Bowl, but they may not be aware that they can also invest in bonds that help make stadiums and the areas that surround them a reality. Municipal bonds have become a significant part of building new stadium projects because these undertakings are seen as an important part of the local economy, explained Dan Close, head of municipals at Nuveen. The bonds themselves help pay for essential infrastructure such as roads and public transportation. The assets are favored by high-income investors since the interest is exempt from federal taxes, as well as state tax if the investor resides in the state in which the bond is issued. However, this corner of the muni bond market is often misunderstood by investors, Close said.