StabilitySharesXSI (XSI) is a scrypt hybrid of both Proof of Work and Proof of Stake. The minimum transaction fee is 0.0001XSI and is redistributed to miners - the backbone of the network. The difficulty retargets every block on a block time of 90 seconds and the block reward varies in a hyperbolic curve manner. The PoW phase comes to an end after 14 days with a total number of coins at 7.5 million XSI. The total number of coins after 30 years will be 15 million XSI and the annual PoS rate is set to 3%.
