My question is how to calculate implied volatility of a stock given I have already known the implied volatilities of all options associated with this stock?
Thinkorswim can displays implied volatility of a stock. Since stock has many options of different strike and expiry date, and each option has its own implied volatility, how does thinkorswim calculate implied volatility of a stock?
In 80s when rates were high, government had surplus. Now in huge deficit. Current debt is 34t. Over 25% government income has to pay interest. With high interest, at some point, the government income is not enough to pay interest