Catch up on the weekend's top five stories with this list compiled by The Fly:

1. General Motors (GM) and United Auto Workers hit a roadblock in contract talks over the question of moving production from Mexico to plants in the U.S., The New York Times' Neal Boudette reported, citing two people familiar with the matter. The union has pressed GM to shift production of some sport utility vehicles and pickup trucks from Mexican factories in order to create and secure jobs in domestic plants, sources said.

2. A pending U.S. lawsuit over claims related to Bayer's (BAYRY) glyphosate-based herbicide Roundup has been delayed, with a new court date set for February, 2020, according to Reuters, citing the company.

3. Almost all of the major brokerage firms-Charles Schwab (SCHW), E-Trade (ETFC), Interactive Brokers (IBKR), and TD Ameritrade (AMTD)-slashed equity-trading commissions to zero this week, with Fidelity and Vanguard seem to be holding out for now, Daren Fonda wrote in this week's edition of Barron's. While customers of the companies may be delighted, analysts slashed their estimates and tried to figure out who the winners and losers would be once the dust settles, the author noted. If there is a winner, it is likely to be Schwab, though the company faces significant near-term challenges, Fonda added.

4. AT&T (T) subsidiary Warner Bros.' "Joker" earned $93.5M domestically in its debut, setting a new opening record for the month of October. The supervillain movie also raked in $140.5M from over 70 markets for a global start of $234M. Audiences gave "Joker" a B+ CinemaScore, while Rotten Tomatoes rating stands at 69%.

5. Delta Air Lines (DAL), TSMC (TSM), Visa (V), Mastercard (MA), Valero Energy (VLO) and Marathon Petroleum (MPC) saw positive mentions in this week's edition of Barron's, while Spotify (SPOT) was mentioned cautiously.