Should You Buy The Dip In MongoDB Stock?
MongoDB (MDB) stock has fallen 26% from its late-August high. Over the past month it lost 24%, while the S&P 500 slipped just 0.5%. When a stock falls that fast, many investors want to buy while the price is low. But you only gain from a lower price if the business itself is still healthy. So is this a chance to buy MongoDB cheaper, or a warning about the business?
MongoDB Fell Mostly On A Leadership Change
MongoDB fell mainly because its CEO left. On September 28, the company said its CEO had stepped down to join Meta Platforms. MongoDB shares fell more than 18% that morning.
Revenue for fiscal Q2 2027 was $772 million, up 30% from a year earlier. Management said the quarter came in above all of its guidance ranges. The shares still fell after that report on September 1. MarketWatch said investors were likely disappointed that Atlas, the cloud database, grew at the same pace for a fifth quarter.
MongoDB named an interim CEO, who takes over a business that had just beaten its own forecasts. MongoDB stock has had bigger drops before, and what followed them is a useful guide.
Have Past Drops In MongoDB Stock Paid Off?
Mostly yes, though buyers first sat through further losses. Here a drop means a fall of 30% or more within 30 trading days. MongoDB stock has had seven such drops since 2017.
Five of the six old enough to judge were higher a year later. The median gain over that year was 45%. The seventh, from March 2026, is still too recent to judge. Today’s 26% fall is smaller than those drops, so they show how such falls went, not what this one will do.
Collecting those gains took patience. Across the six older drops, the median further fall after the drop was 28%. Three of the seven drops were followed by a further fall of 20% or more.
The best gain within a year had a median of 95%. Reaching it took a median of 270 days, about nine months.
| Period | Past Median Return |
|---|---|
| 1M | 8.0% |
| 3M | 36.6% |
| 6M | 71.8% |
| 12M | 45.4% |
| 30 Day Dip | MDB Subsequent Performance | |||||||
|---|---|---|---|---|---|---|---|---|
| Date | MDB | SPY | 1Y | Peak Return |
Max Drop |
# Days to Peak |
||
| Median | 45% | 95% | -28% | 270 | ||||
| 3032026 | -37% | -2% | -11% | 163 | ||||
| 3102025 | -31% | -8% | 48% | 144% | -19% | 303 | ||
| 6042024 | -32% | 6% | -5% | 51% | -37% | 188 | ||
| 9152022 | -31% | -6% | 53% | 85% | -41% | 307 | ||
| 5092022 | -38% | -12% | 4% | 50% | -46% | 93 | ||
| 3242021 | -30% | -0% | 43% | 106% | -14% | 237 | ||
| 3132020 | -31% | -18% | 181% | 267% | -14% | 336 | ||
Those results come from past years, so MongoDB’s business today counts just as much.
What Are You Paying For MongoDB’s Business Now?
You are paying more than the market for each dollar of sales, for a business that is still growing fast. Revenue over the past twelve months rose 26% from a year earlier.
MongoDB also turns its sales into cash. Operating cash flow, the cash its day-to-day business brings in, was 24% of revenue over the past twelve months. MongoDB still shows a small operating loss, equal to 0.5% of revenue. Three years ago that loss was 18.4% of revenue, and it has shrunk each year since.
MongoDB stock trades at 9.7 times its yearly sales, against 3.1 times for the S&P 500. So even after the fall, you pay about three times the market’s price for each dollar of sales.
The main new risk is leadership, because the next report will be the first since the CEO left. In September, management raised its fiscal 2027 revenue forecast to $2.99 billion to $3.03 billion. It guided fiscal Q3 2027 revenue of $756 million to $761 million, growth of 20% to 21% from a year earlier. The fiscal Q3 2027 report is expected on or around November 30, 2026.
If you buy MongoDB now, you are betting that it keeps growing through the change at the top. After past drops, patient buyers were mostly rewarded, but only after further losses. If fiscal Q3 revenue lands at or above management’s guide, revenue will have held to plan through the leadership change. If revenue falls short, the business would be growing more slowly than its own forecast. You would then be paying about three times the market’s price for each dollar of sales.
How To Act On MDB?
Before you decide on MDB, consider a better choice. Since its inception, the Trefis High Quality (HQ) Portfolio has beaten the benchmark that combines the three major indices – the S&P 500, S&P Mid-cap, and Russell 2000. And it did so without taking concentrated risk that comes with retail stock picking.
If you’d rather act on MDB itself:
| Play Offense | Play Defense |
|---|---|
| Learn More About MDB & Invest | Save Taxes On Capital Gain |
| Earn From MDB Cash Secured Puts | Covered Call Against MDB |