Proof: American Style (with Early Exercise / Early Assignment) is better . Better than the European Style. Whoever would ever believe! Not me till yesterday when I made the below important discovery/ies: All explained in this posting and thread: https://www.elitetrader.com/et/thre...g-about-early-assignment.373582/#post-5791890 But true only when used in Options Spread (like Put Spread etc.) trading. .