Advanced technology for television viewers could put downward pressure on ticket prices and facility attendance, Wells Fargo Securities said in a municipal commentary. But the investment bank also called stadium revenue bonds relatively safe investments.

"To be sure, we are in the early innings of this dynamic with game-day attendance figures showing resiliency despite choppy economic conditions," New York senior analyst Randy Gerardes wrote. "Nevertheless, we believe demand elasticity for the in-person game-day experience will increase."

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