What is the market doing?
What the tape says about TNDM
Tandem Diabetes Care, Inc. is +83% over the past year while the S&P 500 is +20%: 63 points ahead of the market.
+83%
1-year return · S&P 500 +20%
- vs 200-day average
- +0.59%
vs 200-day average · close to trend
- RSI (14)
- 33
RSI (14) · neutral
- Below its 52-week high
- 30%
Below its 52-week high
Details›
- Last close2026-09-08
- $19.88
- 1 monthS&P 500 −0.30%
- +11%
- 1 yearS&P 500 +20%
- +83%
- 5 yearsS&P 500 +85%
- −81%
- vs 50-day average$18.96
- +4.8%
- 52-week high
- $28.26
- 52-week low
- $10.68
- Annualised volatility
- 75%
- Insider buying, net, 6 monthsForms 3/4/5 to 2026-06-30
- −$4K
| Year | Return |
|---|---|
| 2026 (year to date) | −9.6% |
| 2025 | −39% |
| 2024 | +22% |
| 2023 | −34% |
| 2022 | −70% |
| 2021 | +57% |
| 2020 | +61% |
| 2019 | +57% |
| 2018 | +1509% |
| 2017 | −89% |
| Month | Years | Positive | Average |
|---|---|---|---|
| Jan | 10 | 5 of 10 | +0.56% |
| Feb | 10 | 6 of 10 | +5.6% |
| Mar | 10 | 4 of 10 | −0.63% |
| Apr | 10 | 5 of 10 | +3.2% |
| May | 10 | 5 of 10 | +5.8% |
| Jun | 10 | 4 of 10 | +3.0% |
| Jul | 11 | 6 of 11 | +2.8% |
| Aug | 11 | 8 of 11 | +13% |
| Sep | 11 | 4 of 11 | −5.3% |
| Oct | 10 | 4 of 10 | −9.5% |
| Nov | 10 | 4 of 10 | −2.1% |
| Dec | 10 | 7 of 10 | +6.0% |
End-of-day closes from IEX; the S&P 500 comparison uses SPY over the same window. Prices are a reference point, not a basis for trading decisions.