Open market operations are how a central bank manages the amount of money circulating in the banking system. A deposit-taking operation pulls birr out: banks park cash at the National Bank for a fixed term, which tightens liquidity and supports the policy rate.
Instruments recorded here: 2-Weeks Deposit-Taking Operation. A rate is shown only where the auction carried a fixed one; uniform-rate auctions clear at a rate set by the bidding.