Under the agreement with Fox, Sinclair has the option to buy WUTB, Fox's MyNetwork station in Baltimore, for up to $52.7 million between July 1 and March 31, 2013.
The Hunt Valley-based company owns flagship station and Fox affiliate WBFF-TV, known as Fox 45.
"For us, a pivotal aspect of the agreement was securing our [Fox] affiliation on WBFF-TV," Smith said. "Our Fox affiliate in Baltimore is one of our most important television assets, and over the years the station has built a strong local brand."
Smith added that before reaching the agreement with Fox, Sinclair believed that affiliation was "at risk."
But ownership of WUTB "would solidify WBFF's position as a Fox affiliate in Baltimore in the long term," he said.
If the company exercises its option, it would then have to assign or sell that option to a third party because of federal rules governing television station ownership in a given market, said David Amy, Sinclair's chief financial officer.
Owning an option on a second Baltimore Fox affiliate would give Sinclair "the additional bonus of possibly creating a duopoly (and eliminating a tough competitor) in one of SBGI's most important markets," Marci Ryvicker, a senior analyst for Wells Fargo, wrote in a report on Tuesday.
Radio and television broadcasters refer to a duopoly as a single company that controls two or more stations in the same city.
In return, the agreement says, Fox can purchase Sinclair's MyNetwork/CW stations in up to three of four markets: Raleigh, N.C.; Las Vegas; Cincinnati; or Norfolk, Va., at fair market value. If Fox exercises its option in any of those markets, Sinclair's maximum purchase price for WUTB would be reduced by $25 million, the agreement says.
The agreement to renew all of Sinclair's current affiliations with Fox from Jan. 1 through Dec. 31, 2017, allows the company to continue as the largest Fox-affiliated broadcaster in the United States, Smith said.