BlockBeats News, June 17th, Helius researcher released the proposed SIMD-550 proposal, suggesting an update to Solana's inflation schedule, increasing the deflation rate from -15% to -30%, doubling the speed of inflation reduction. This would bring inflation to the long-term steady-state rate of 1.5% within 2.8 years (first half of 2029) instead of 5.7 years (first half of 2032). According to their model, this proposal would reduce the issuance of 18.89 million SOL over six years, worth approximately $15.1 billion, while gradually decreasing the nominal staking yield over the first three years from around 5.84% to around 4.34%, 3.00%, and 2.25%. The expected impact of the halving of inflation on profitable validators is limited, with 2 validators transitioning from profit or breakeven to loss in the first year, 13 in the second year, and 30 in the third year.

SIMD-550 is an updated version of SIMD-411 (November 2025), which was discontinued due to ecosystem awaiting new tools. SIMD-550 can be seen as part of a broader effort to improve the SOL tokenomics. Other parts include SIMD-553, proposing additional burning of resource fees, and Alpenglow's Validator Admission Ticket (VAT).