Does Vanna Tend to Be Highest for ATM or OTM Options?
Vanna tends to be highest for At-the-Money (ATM) options. This is because the Delta of an ATM option is most sensitive to changes in implied volatility.
A small change in IV has the largest impact on the probability of an ATM option expiring ITM, leading to the greatest change in Delta, which is the definition of Vanna.