# Portfolio Greek Exposure Equations

What are the calculations for calculating greek exposures in a portfolio of equities and equity options? I think I have them but I want to be sure. Are these correct (for vanilla options)?

deltaDollars = delta * quantity * 100

gammaDollars = gamma * quantity * 100

vegaDollars = vega * quantity * 100

thetaDollars = theta * quantity * 100

rhoDollars = rho * quantity * 100


I think that for calculating exposures for a whole portfolio, I can sum up these values for each position in the whole portfolio. Is this correct?

I am not sure about summing gammaDollars in this way because gamma is a second derivative. If my portfolio has only these positions:

• 23 MSFT options (gamma = 0.1, gammaDollars = $230) • 29 AAPL options (gamma = 0.2, gammaDollars =$580)