Spero Therapeutics Inc (SPRO) — Defensive Interval Ratio
Spero Therapeutics Inc (SPRO) has a Defensive Interval Ratio of 1045 days as of December 2025. Defensive assets of $25.39 Million (cash $-, short-term investments $-, receivables $25.39 Million) cover 1045 days of daily cash needs of $24.30K/day. See SPRO working capital ratio to evaluate short-term liquidity relative to the company's equity base.
Defensive Interval Ratio
Defensive Assets
Daily Cash Need
Current Liabilities
Spero Therapeutics Inc Defensive Interval Ratio (2015–2025)
This chart shows how Spero Therapeutics Inc's Defensive Interval Ratio has evolved across 11 annual periods from 2015 to 2025. As of December 2025, the ratio stands at 1045 days, meaning defensive assets of $25.39 Million can fund 1045 days of operations without new revenue. See Spero Therapeutics Inc balance sheet independence to measure how much of total assets are equity-financed.
Annual Defensive Interval Ratio for Spero Therapeutics Inc (2015–2025)
The table below presents the year-by-year Defensive Interval Ratio for Spero Therapeutics Inc from 2015 to 2025, covering 11 annual filings. Each row shows defensive assets, daily cash need, the DIR in days, and the change in days compared to the prior year. For live market cap and the full company financial profile, see Spero Therapeutics Inc stock valuation.
| Year | DIR (days) | Defensive Assets (USD) | Daily Cash Need | Cash | ST Investments | Change (days) |
|---|---|---|---|---|---|---|
| 2025 | 1045 days | $25.39 Million | $24.30K/day | $- | $- | ▲ +655 days |
| 2024 | 390 days | $52.48 Million | $134.45K/day | $- | $- | ▼ -108 days |
| 2023 | 498 days | $50.70 Million | $101.79K/day | $- | $- | ▲ +480 days |
| 2022 | 18 days | $1.08 Million | $59.31K/day | $- | $0.00 | ▼ -695 days |
| 2021 | 713 days | $36.46 Million | $51.15K/day | $- | $33.82 Million | ▼ -505 days |
| 2020 | 1218 days | $47.87 Million | $39.30K/day | $- | $41.70 Million | ▲ +362 days |
| 2019 | 856 days | $62.56 Million | $73.05K/day | $- | $52.31 Million | ▼ -1593 days |
| 2018 | 2449 days | $82.66 Million | $33.75K/day | $- | $81.36 Million | ▲ +2318 days |
| 2017 | 132 days | $2.94 Million | $22.35K/day | $- | $0.00 | ▲ +116 days |
| 2016 | 16 days | $304.00K | $18.95K/day | $- | $- | ▲ +15 days |
| 2015 | 1 days | $10.00K | $17.59K/day | $- | $- | — |