If you are selling a stock/mutual fund/bond at a loss one can't buy same security within 61 days (30 before and 30 after of trade date). It is due to WASH rules. That is clear.
What is similar rule? I assume if you sold VFINX (vanguard S&P500 Index fund) at loss and bought SPY or any other S&P500 Index fund they will be consider similar. What are other criteria of similar? If I sold Ford Motor at a loss and bought GM within 61 day window does WASH rule apply?
Now real question What are WASH rules for Options?
Option they are chains for same underlying security and expiration are weekly or month so more. Each and every Option can make or loose money. They are same underlying. Lets say Ford is trading $10 so $11 or $122 Calls are similar or may be not.
