It wouldn’t be a securities violation, but it might be an ethics violation. Agents must be careful what kind of representations they make about return on investment. If in doubt, run it by the local board or the state licensing authority.
If a licensed Realtor is attempting to sell Real Estate on the merits of its potential Return on Investment, doesn’t that cross into the realm of the SEC and require a different license?
As an example, suppose a Realtor is selling properties at a new development and making claims such as “This can probably increase 30% in value” or “You can make 100% return on your money.” It would appear to me like this Realtor is no longer attempting to sell Real Estate but rather selling investments to the public without the benefit of a prospectus.