{"index_id":"mma-spread","label":"Money Market Spread Index","representative_balance":25000,"unit":"money market accounts","source":"https://www.switchwize.com/indices/mma-spread","series":[{"month":"2026-06-01","index_value":544,"baseline_apy":1.78,"top_avg_apy":3.95,"gap_points":2.17,"units_tracked":42}]}