Cboe S&P 500 One-Week PutWrite Index (WPUT)
The Cboe Russell 2000 One-Week PutWrite IndexSM tracks the value of a hypothetical portfolio of securities (WPTR portfolio) that yields a buffered exposure to Russell 2000® stock returns. The WPTR portfolio is composed of Treasury bills and of a position in a one-week at-the-money put option on the Russell 2000 index (RUT put).
The WPTR portfolio is rebalanced weekly, typically on Fridays after the expiration of weekly RUT options. SPX weekly options expire at the close, except on the third Friday of the month, when they expire at 11 am ET. A new one-week SPX put is then sold.