Stock price when the opinion was issued
Largest in the category. ZBK is unhedged, but there's a hedged version as well (ZUB). He'd opt to start hedging risk away a bit more, given what seems a concerted effort to weaken the USD. Gives you diversification in the US banks, instead of Canadian banks, as it's a different market and different economy.
Banks are very sensitive to the economy, and we're in a recessionary period. He'd wait for positive market follow throughs before allocating capital. If you're in it for the long term, you could buy this on the pullback. Interestingly, US banks are down about 21%, whereas Canadian banks (as in ZEB) are down 9%.
Despite being better diversified, US banking space can be more volatile than Canada's. Achieves more capital growth then an ETF with a covered call strategy. As well, consider some of the active options as offered, for example, from Hamilton.