The Tata's are buying 500 jets from airbus and Boeing in a deal that could be worth over 100 billion dollars. This got us thinking, why is the jetliner marketed duopoly with just two suppliers bossing the trade? How do just two entities come to own 99% of the market? Well, to understand this, we need to go back in time. The story begins all the way into 1916 when Boeing began its journey as an aero products company. It was also ferrying mail on the side since it was quite profitable.