The inspirations were the Chicago Board of Trade (known as 'The Pit') and the US Corn Exchange and it was likely based on the very successful game Gavitt's Stock Exchange, invented in 1903 by Harry E. Gavitt of Topeka, Kansas
Cover for the Parker Bros Game purchased for 75 cents from Elder's, which I learned was a down town Dayton Department store back in those days comment from a Dayton resident "Here is the story of Elder's as I know it. My Mom and I would go shopping downtown going to Elder's when it was just Elder's. Big department store like Rike's. Arthur Beerman worked there as a young boy running an elevator. The boss, I am not sure who the boss of Elder's was at the time, fired Mr. Beerman. He told the boss, "I will own this store someday." He was laughed at. A few years later Mr. Beerman somehow bought Elder's either shrewdly or with a lot of backing. He came in and fired the boss. I am not sure of this story, but that is what I learned years ago. Good story if isn't true. I went to high school with Barbara Beerman. "
Rook is a trick-taking game, usually played with a specialized deck of cards. Sometimes referred to as "Christian cards" or "missionary poker", Rook playing cards were introduced by Parker Brothers in 1906 to provide an alternative to standard playing cards for those in the Puritan tradition or Mennonite culture who considered the face cards in a regular deck inappropriate because of their association with gambling and cartomancy.