All valid STEEM stakeholders will receive a perfectly mirrored balance of their current STEEM holdings in the new HIVE coin. This will include matching amounts of current liquid STEEM, Steem Power, and SBD. All other account state data, such as claimed accounts, delegations, etc. will be mirrored onto Hive.

For example: if your Steem account has 10 STEEM, 5 SBD, and 1000 SP, your new Hive account will have 10 HIVE, 5 HBD, and 1000 HP.

From: https://steempeak.com/communityfork/@hiveio/announcing-the-launch-of-hive-blockchain