It was 9:31 p.m. in New York on Tuesday when NBA Commissioner Adam Silver stepped onto the stage at Brooklyn's Barclays Center and announced Nate Ament as 13th overall pick, live on ESPN and ABC. For a brief moment, the 19-year-old Rwandan-American prospect belonged to the Miami Heat. However, Ament was among three first-round picks included in a blockbuster trade that sent him to the Milwaukee Bucks as part of Miami's deal to acquire Giannis Antetokounmpo. But why are draft picks traded? One aspect of the NBA Draft that often confuses fans is the trading of draft picks. Teams can exchange draft selections months—or even years—before the draft takes place. As a result, the team announcing a player's name is not always the team that ultimately acquires him. These transactions allow franchises to move up or down the draft order, accumulate future assets or target specific players. It is one of the reasons draft night is as much about strategy as it is about talent evaluation. Ament's case provides a recent example. Although he was selected by the Miami Heat, his rights were later included in a trade package that sent him to the Milwaukee Bucks as part of the deal for Giannis Antetokounmpo. How do drafted players get traded before hitting the court? NBA draft picks are not fixed assets until a player signs a contract, which is why teams can trade drafted players immediately after selecting them. In practice, this means a player can be chosen by one franchise on draft night and have his rights sent to another team moments later as part of a prearranged or live trade agreement. The NBA Draft itself is a two-round selection process in which 60 players are chosen each year. ALSO READ: NBA: Rwandan-American Nate Ament drafted by Miami Heat The order is determined first by the NBA Draft Lottery for the top 14 picks, followed by reverse order of regular-season records for the rest of the first and second rounds. The lottery, held annually before the draft, assigns the top four picks through a weighted drawing system designed to discourage tanking. According to NBA rules, all 30 teams receive one pick in the first round and one in the second round, though those selections can be traded multiple times before and during the draft. The league allows teams to trade future draft picks up to seven years in advance, as long as they comply with roster and salary-cap rules, including the “Stepien Rule,” which prevents teams from trading away consecutive future first-round picks and leaving themselves without draft protection in alternate years. ALSO READ: NBA Draft pick Nate Ament says ‘would entertain’ playing for Rwanda Eligibility for the draft is straightforward Players must be at least 19 years old during the calendar year of the draft, and U.S. college players typically become eligible after at least one year removed from high school. Many international players are automatically eligible once they reach the age threshold. Once selected, a player’s rights belong to the drafting team, even if he has not signed a contract. That ownership of “draft rights” is what makes draft-night trades possible. Teams often agree to deals before a selection is made, then instruct the drafting team on who to pick. Once the player is selected, his rights are immediately transferred in a trade that may involve other players, future picks or cash considerations. Until the league office formally approves the transaction, the trade is considered pending. This system explains why players often appear on stage wearing one team’s cap but are introduced as members of another. The selection and trade are effectively part of the same transaction, just completed in stages. Why are first-round picks so valuable? First-round picks come with a rookie-scale contract, which guarantees salary terms for the early years of a player’s career. That contract structure makes them especially valuable in trades because they provide cost-controlled talent for several seasons. Second-round picks do not have the same guaranteed structure, which gives teams more flexibility in how they sign or move those players. Because draft picks can be traded for established players, salary relief or future assets, they function as a form of currency in NBA roster building. That is why rebuilding teams often collect picks, while championship contenders often trade them away for proven stars. Analysts note that in many cases, the team that drafts a player is not the team that had him highest on its board, but rather the team best positioned to execute a larger trade strategy.