Real estate agents are professionals who help in connecting the buyer to the seller. A lot of real estate agents also do rentals wherein they connect tenants to landlords and even maintain the property on the behalf of the landlords.
Modern day stock trading is almost entirely run by computer. That means that day trading stock online is within easy reach of almost any individual with modest intelligence and some basic tools to help them along the path. With this in mind a day dealer can work from almost anywhere in the world. A living room or the back yard pool or even on vacation if the mood hit them.