Netflix shares sank on Tuesday after the streaming television powerhouse reported quarterly profit that fell short of market expectations. "It's not an income tax; it's a cost of doing business in Brazil," said Netflix chief financial officer Spencer Neumann. Netflix shares were down more than six percent to slightly less than $1,163 in after-market trades that followed release of the earnings figures. An ad-supported membership level had its best sales quarter to date as Netflix continues to challenge traditional television programming, the company said. "It's our responsibility to look at every significant opportunity," Peters said when asked whether Netflix is interested in buying Warner Brothers Discovery.