How much money do Harvard have in the bank?

Harvard University doesn't publicly release a precise figure for how much money it has "in the bank" at any given time. Their financial reports show their endowment, which is a significantly larger sum invested in various assets (stocks, bonds, real estate, etc.), not just cash held in bank accounts. The endowment size is publicly reported, and fluctuates based on market performance. Checking the university's financial statements (usually available on their website) would give you the most up-to-date endowment figure, but that is not the same as cash in the bank.