Great spot! Think about what resource represents the highest cost to a bank - Not IT or real estate; it is people! The salaries and bonuses form the single largest expense of a bank. That is why they have great HR departments. Banks always claim that they want to recruit the best and the brightest, and true to their word, they go to great lengths ensuring they have the means of doing so: on campus recruitment, work-life balance programs, implementation, firings (err yes, sometimes banks have to fire people) and relocation, etc…
Like any other big corporation, a bank must invest in people recruiters and people managers; HR is also the first employer of graduates: during their first year, graduates belong to HR. In HR, you pay for their housing, you pay for their training, and you even pay their salary. Being in HR in a bank is a great way to jump start a career in people management. You will interview, recruit and “exit” a large amount of people in a short time; giving you the opportunity to obtain experience quickly and efficiently.