IDXX monthly performance report
Explore IDXX's monthly returns, drawdown, and seasonality trends — updated every month.
IDXX monthly report
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Key takeaways
- Idexx Laboratories (IDXX) closed September 2026 at $513.62, down 7.74% for the month and −20.45% over the trailing 12 months.
- Year-to-date, IDXX is −24.08%, underperforming the S&P 500 which has returned +10.58% YTD.
- The stock is trading −15.01% versus its 200-day moving average ($604.31), a cautious technical signal.
- Over the past three years, IDXX has underperformed the S&P 500 by −56.11%, with a relative strength index reading of 67.1.
- Win rate over the trailing 39 months stands at 43.6% — 17 positive months versus 22 negative months.
Idexx Laboratories ended September 2026 at $513.62, posting a monthly return of −7.74%. The S&P 500 returned −1.69% over the same window, leaving relative performance at −6.04%.
The current quarter stands at −2.44% (Q3 2026 (QTD)), while medium-term trend remains soft: price is −15.01% versus the 200-day moving average ($604.31).
Year-to-date, IDXX is −24.08% against SPY +10.58%, a gap of −34.66%. The stock is currently −33.29% below its 52-week high, with maximum 3-year drawdown at −37.41%.
| Period | IDXX | S&P 500 (SPY) | Excess return |
|---|---|---|---|
| 1 Day | +0.57% | −0.44% | +1.01% |
| 1 Week | −0.30% | −1.10% | +0.80% |
| 1 Month | −7.74% | −1.69% | −6.04% |
| 3 Months | −8.43% | −0.10% | −8.32% |
| 6 Months | −14.23% | +13.21% | −27.44% |
| YTD | −24.08% | +10.58% | −34.66% |
| 12 Months | −20.45% | +14.25% | −34.70% |
| 3 Years | +13.96% | +70.07% | −56.11% |
| Rank | Month | Return |
|---|---|---|
| #1 | Aug 2025 | +21.11% |
| #2 | Nov 2025 | +19.60% |
| #3 | Dec 2023 | +19.16% |
| #4 | May 2025 | +18.65% |
| #5 | Nov 2023 | +16.61% |
| Rank | Month | Return |
|---|---|---|
| #1 | Oct 2024 | −19.46% |
| #2 | Sep 2023 | −14.50% |
| #3 | Mar 2026 | −14.44% |
| #4 | Dec 2025 | −10.14% |
| #5 | Apr 2024 | −8.74% |
| Quarter | Return |
|---|---|
| Q2 2025 | +27.72% |
| Q3 2025 | +19.12% |
| Q4 2025 | +5.89% |
| Q1 2026 | −16.95% |
| Q2 2026 | −6.31% |
| Q3 2026 (QTD) | −2.44% |
| Year | Return |
|---|---|
| 2023 | +36.06% |
| 2024 | −25.51% |
| 2025 | +63.63% |
| 2026 | −24.08% |
| Metric | Value |
|---|---|
| 52-Week High | $769.98 (2025-11-26) |
| 52-Week Low | $500.61 (2026-09-11) |
| Current Price | $513.62 |
| 200-Day Moving Average | $604.31 |
| Price vs 200DMA | −15.01% |
| 3-Year Maximum Drawdown | −37.41% (2025-04-08) |
| Current Drawdown from 52W High | −33.29% |
| RS metric | Value |
|---|---|
| RS Index (3-year, rebased to 100) | 67.1 |
| 3-Year Excess Return vs S&P 500 | −56.11% |
| RS Peak | 116.8 (Dec 2023) |
| RS Trough | 65.1 (Sep 2026) |
| Status | Underperforming Benchmark |
Frequently asked questions
What was IDXX's return for this report period?
IDXX returned −7.74% in the latest monthly window ending 2026-09-16.
Has IDXX outperformed SPY year to date?
YTD IDXX: −24.08% vs SPY: +10.58%.
What is IDXX's 12-month return?
−20.45% over the trailing 12 months.
Is IDXX above or below its 200-day moving average?
Price is −15.01% versus 200DMA ($604.31).
What is the maximum drawdown in the 3-year window?
−37.41% on 2025-04-08.