BIL is the US-dollar equivalent of CBIL: a cash-management ETF that holds nothing but short-dated US Treasury Bills (1-3 month maturities). It does one job, parking cash safely in the most liquid, most trusted government debt market in the world, and pays the income out monthly. It is backed by the full faith and credit of the US government, trades on the NYSE, and holds its price tightly around $91-92. Because the US Federal Reserve's policy rate sits meaningfully above the Bank of Canada's, BIL currently yields around 4.0%, notably higher than CBIL's ~2.2%. For a Canadian investor, that higher yield comes with a catch: BIL is denominated in US dollars, so you take on CAD/USD currency risk. The exchange rate can move more in a week than BIL yields in a year, which means BIL is really two bets in one: a bet on US short-term rates (the safe part) and a bet on the US dollar versus the loonie (the volatile part). It is an excellent USD cash-parking and hedging tool if you already think in USD or want USD exposure; it is a currency bet wearing a safe-asset costume if you do not.