Federal prime-contract obligations plotted over time, at monthly, quarterly or yearly frequency, sourced from FPDS-NG through USAspending.gov. Trend data answers questions a single-year snapshot cannot: whether an agency's buying is growing or contracting, how sharply obligations spike in the fourth quarter as agencies spend down expiring budget authority, and whether a market you are entering is expanding fast enough to support a new entrant. Year-over-year change and compound annual growth rate are computed only across completed fiscal years, because a partial current year would otherwise read as a collapse in spending. The federal fiscal year runs October through September, so FY2026 began in October 2025 — comparing federal spending on a calendar-year basis misaligns every quarter and misstates the seasonal pattern entirely. Use the frequency control to move between a strategic multi-year view and the month-level detail that reveals when in the year a specific agency actually obligates its money.