I'll underline a couple of things. First of all, using balance sheet is part of our extended tool kit. It is an unusual thing. It's not something we've done before, but we haven't had a pandemic before. We have never before had the type of collapse in economic activity we've seen in recent months.
There is more uncertainty about it, and I could certainly understand that Canadians would have questions about it, but as I tried to outline in my opening remarks, it's really an alternative way for us to lower interest rates. Normally, we lower interest rates by simply lowering the policy rate, but now that the policy rate is at its effective lower bound, we can't do that anymore. Therefore, to lower rates further out the yield curve where households and businesses borrow, we buy government bonds and that pulls it down. Yes, it's a different tool, but it works effectively in the same way as our traditional tool.
In terms of our balance sheet, we've been very careful in our policies to define the conditions under which we would exit. With respect to quantitative easing, we've indicated that we will continue the program until the recovery is well under way. Once we decide that the recovery is sufficiently self-sustaining, it's well under way and it doesn't need quantitative easing anymore, other central banks have exited from this and there are a number of steps you could take.
That's still some time off, so we haven't made any decisions yet. However, to give you a picture of what that looks like, the first thing is that you'd buy less; then you'd stop buying, but keep reinvesting the bonds that roll off, to keep your balance sheet stable. The next thing you could do would be to stop reinvesting, so as things roll off, your balance sheet would go down gradually, and if you needed to, you could even sell assets and tighten monetary policy more quickly. Certainly if you became concerned that inflation was breaking out, that is something you could do.
With respect to interest rates, we've indicated that we would hold the policy rate at the effective lower bound until slack is absorbed. Again, that defines the conditions for exit. Once slack is absorbed, I think you could expect that we would begin to raise interest rates. Again, that's some time into the future. In our own projection, it's in 2023.