Why do brokers ask to sign NDA?

[Nick B.]

Hello, BP!

Why many (if not all) multifamily listing agents/brokers ask for NDA before showing property financial details? How am I supposed to discuss these listings with other people that may be involved in the deal on my side (agent, banker, partner, etc.) without breaking the NDA yet showing all the detail to them?

Another twist is a foot note that I saw on some ads: "No Brokers. If you are already working with a broker please disregard my ad". What does it mean? Is this a red flag?

Thanks
Nick