How Can I Beat the S&P 500? What the Evidence Says
The honest answer to the most asked question in investing: how many people beat the index, why it is so hard, why investors trail even their own funds, and how daily market context fits in.
DexCom, Inc., healthcare (market value $31.6 billion), a member of the S&P 500 and the Nasdaq‑100: how it compared with the S&P 500, how it behaved in every crash since 2008, its risk‑adjusted returns and what analysts said. Data as of Oct 30, 2026.
Exent re-checks this page every day. Ratings appear 30 days after they are published; the top‑ranked analysts’ calls are not counted here, they are in Gems.
What do the best‑ranked analysts on DXCM say now? See it in Exent Gems →
Over the 5 years to Oct 30, 2026, DexCom, Inc. (DXCM) returned −47.2% including dividends, versus +75.9% for the S&P 500 (SPY). It lagged the index by 123.1 percentage points, or −12.0% a year against +12.0%.
| Period | DXCM | S&P 500 | DXCM per year | S&P 500 per year | Result |
|---|---|---|---|---|---|
| 1 year | +41.3% | +12.0% | +41.3% | +12.0% | Beat |
| 3 years | −7.4% | +87.4% | −2.5% | +23.3% | Lagged |
| 5 years | −47.2% | +75.9% | −12.0% | +12.0% | Lagged |
| 10 years | +320.7% | +316.3% | +15.5% | +15.3% | Beat |
Total return with dividends reinvested, from month-end prices to Oct 30, 2026. Beating the index on raw return is only half the story: the next section adjusts for the risk taken. See also how to beat the S&P 500.
DXCM is in the S&P 500 and the Nasdaq‑100 (members as of Oct 20, 2026); the lists show every member’s return against the index.
In the 12 months to 30 days ago, 28 analysts published 317 ratings on DXCM. Their latest calls were 84% Buy, 8% Hold and 8% Sell. 3 of them rank 4★ or higher in Exent’s analyst scoring, which is based on each analyst’s past price‑target hit rate and returns.
The consensus 12‑month price target was $87.44 (range $72.00–$112.00), +3.2% from the last price. Remember that the average analyst’s target is hit only about half the time: how accurate are price targets?
| Top‑ranked analyst covering | Firm | Stars | Price‑target hit rate |
|---|---|---|---|
| Steven Lichtman | William Blair | 4.8★ | 47.5% |
| Jayson Bedford | Raymond James | 4.7★ | 45.4% |
| Anthony Petrone | Mizuho Securities | 4.7★ | 44.4% |
Ratings are shown with a 30‑day delay. Who the top‑ranked analysts on DXCM are, their live calls and the median target of only the top‑rated analysts are in Exent Gems.
The average analyst’s target is reached about 53.1% of the time; Exent Gems is built on the top 50 of Exent’s ranking,where some reached 90% or more over the last two years. Unlock the top 50 analysts.
DXCM beat the S&P 500 in 5 of the 9 full calendar years shown.
| Year | DXCM | S&P 500 | Difference |
|---|---|---|---|
| 2026 (to Oct 30, 2026) | +24.0% | +11.7% | +12.3% |
| 2025 | −14.7% | +17.7% | −32.4% |
| 2024 | −37.3% | +24.9% | −62.2% |
| 2023 | +9.6% | +26.2% | −16.6% |
| 2022 | −15.6% | −18.2% | +2.6% |
| 2021 | +45.2% | +28.7% | +16.5% |
| 2020 | +69.0% | +18.3% | +50.7% |
| 2019 | +82.6% | +31.2% | +51.4% |
| 2018 | +108.7% | −4.6% | +113.3% |
| 2017 | −3.9% | +21.7% | −25.6% |
Over 5 years, DXCM had a Sharpe ratio of −0.09 against 0.58 for the S&P 500, so it earned less return per unit of risk than the index. Its annualized volatility was 49.5% and its beta 1.45: it tended to move about 1.4× as much as the market.
| Metric | DXCM | S&P 500 |
|---|---|---|
| Annual return | −12.0% | +12.0% |
| Volatility (annualized) | 49.5% | 15.5% |
| Sharpe ratio | −0.09 | 0.58 |
| Sortino ratio | −0.13 | 0.91 |
| Max drawdown (month-end) | −62.6% | −23.9% |
| Beta to the S&P 500 | 1.45 | 1.00 |
Sharpe divides return above cash by total volatility; Sortino counts only downside volatility. Both use monthly returns and the 1–3 month T‑bill ETF (BIL) as the risk‑free rate.
DXCM’s deepest fall in the crises below was −87.0% in the global financial crisis (2007–09), against −56.5% for the S&P 500. The last column turns that into money: what a $100,000 position would have lost from peak to trough.
| Crisis | DXCM | S&P 500 | Loss on $100,000 |
|---|---|---|---|
| Global financial crisis (2007–09) | −87.0% | −56.5% | −$86,990 |
| 2018 trade-war selloff | −27.8% | −20.2% | −$27,780 |
| COVID crash (Feb–Mar 2020) | −36.8% | −34.1% | −$36,810 |
| 2022 inflation bear market | −48.8% | −25.4% | −$48,840 |
| 2025 tariff selloff | −34.1% | −19.0% | −$34,070 |
| Window | DXCM max drawdown |
|---|---|
| Last 1 year | −22.6% |
| Last 3 years | −61.0% |
| Last 5 years | −66.3% |
| Last 10 years | −66.3% |
Peak‑to‑trough declines from daily prices inside each crisis window. A crash replay does not predict the next crisis; it shows how much room a holding needs. Run the same replay on a whole portfolio with the crash test.
Correlation runs from −1 (moves opposite) to +1 (moves in lockstep). Over the last 60 months of monthly returns, DXCM’s correlation with the S&P 500 was 0.45, with the Nasdaq‑100 0.36, with long Treasuries (TLT) 0.05 and with gold (GLD) 0.07.
Adding a 5% DXCM position to an S&P 500 portfolio would have moved its 5‑year volatility from 15.5% to 16.0%.
| Least correlated large caps | Correlation | Most correlated large caps | Correlation |
|---|---|---|---|
| UNH | −0.08 | ISRG | 0.48 |
| SO | −0.04 | SYK | 0.48 |
| GLW | −0.02 | CTAS | 0.47 |
| DUK | −0.01 | ECL | 0.45 |
| KLAC | −0.01 | CRWD | 0.45 |
Holdings that are highly correlated behave like one position in a selloff. See how to find hidden overlap.
| Date | Rating and target | Analyst |
|---|---|---|
| Oct 30 | Target raised Buy | Jayson Bedford |
| Oct 13 | Target raised Buy | Anthony Petrone |
| Oct 1 | Target raised Buy | Kendall Au |
| Sep 18 | Target raised Buy | Richard Newitter |
Named analysts’ rating and price‑target changes on DXCM in the 5 weeks to Oct 4, 2026, shown 30 days after publication (the free analysts’ calls 3 days after). The top‑ranked analysts’ calls are in Exent Gems. See all of the latest analyst upgrades and downgrades.
Of the 549 analyst price targets on DXCM set from 2019 until a year ago, 49.5% were reached within 12 months (data to Oct 20, 2026), 19.1 points below the 68.6% hit rate of the median stock in Exent’s study of 794 stocks. Targets that were reached took a median of 67 days. The median target sat 19.7% above the share price on the day it was set.
Where analysts said DXCM would be by now: a year ago, 18 analysts had a price target on DXCM, and the median of their latest targets was $84.50. On Oct 20, 2026 DXCM closed at $85.75, 1.5% above it.
| After | Calls | Move on the call | 3 months vs S&P 500 |
|---|---|---|---|
| Upgrades of DXCM | 10 | +3.6% | +7.6% |
| Upgrades, all stocks | 11,514 | +2.5% | +3.4% |
| Downgrades of DXCM | 5 | −16.8% | −30.2% |
| Downgrades, all stocks | 10,700 | −3.0% | −1.6% |
The move on the call runs from the close before the rating change to the close after it; the last column is the stock’s return minus the S&P 500’s over the next three months. Averages of rating changes on DXCM through Sep 15, 2026; analysts are not named here. Do analyst upgrades move stocks?
DXCM beat the consensus earnings‑per‑share estimate in 10 of its last 12 quarterly reports, through the one on Jul 30, 2026, and the revenue estimate in 11 of 12. From the close before each report to the close after it, the stock moved 10.8% on average, up or down, against 6.8% for the average report across the 1,002 US stocks Exent tracks. It rose after 7 of the 12 reports. In 5 of the 10 beats the stock still fell.
| Report | EPS vs estimate | Revenue vs estimate | Stock move |
|---|---|---|---|
| Jul 30, 2026 | $0.70 vs $0.61 | +1.4% | +11.1% |
| Apr 30, 2026 | $0.56 vs $0.47 | +1.5% | +6.6% |
| Feb 12, 2026 | $0.68 vs $0.65 | +0.9% | +2.7% |
| Oct 30, 2025 | $0.61 vs $0.58 | +2.2% | −14.6% |
| Jul 30, 2025 | $0.48 vs $0.44 | +2.9% | −9.6% |
| May 1, 2025 | $0.32 vs $0.33 | +1.8% | +14.3% |
| Feb 13, 2025 | $0.45 vs $0.48 | +0.4% | +6.2% |
| Oct 24, 2024 | $0.45 vs $0.44 | +0.4% | +1.3% |
Reported earnings per share against the consensus estimate, revenue surprise in percent, and the stock’s price change over the two sessions around the report. How stocks move after earnings
In fiscal 2025 (the year to Dec 31, 2025), DXCM’s largest reported region was Non-US, with 100.0% of its $1.3 billion revenue.
From DXCM’s annual filings. Regions are as each company reports them, so one company’s “Asia Pacific” is not another’s. China counts the regions a company reports as China, Greater China or Hong Kong; a separately reported Taiwan is not counted. Which S&P 500 companies depend most on China?
As of Oct 20, 2026, 13 members of Congress had disclosed 58 trades in DXCM (29 buys and 29 sales) in STOCK Act disclosures filed with the House and Senate. The latest public trade is dated May 1, 2026.
| Trade date | Member | Type | Amount |
|---|---|---|---|
| May 1, 2026 | Ro Khanna | Buy | $1,001–$15,000 |
| Apr 13, 2026 | Ro Khanna | Buy | $1,001–$15,000 |
| Jan 29, 2026 | Ro Khanna | Buy | $1,001–$15,000 |
| Jan 26, 2026 | John Boozman | Buy | $1,001–$15,000 |
| Sep 29, 2025 | Ro Khanna | Sale | $1,001–$15,000 |
| Sep 22, 2025 | Michael McCaul | Buy | $1,001–$15,000 |
| Jun 16, 2025 | Michael McCaul | Sale | $15,001–$50,000 |
| Jun 2, 2025 | Michael McCaul | Buy | $15,001–$50,000 |
| May 15, 2025 | Rob Bresnahan | Buy | $1,001–$15,000 |
| May 12, 2025 | Jefferson Shreve | Sale | $15,001–$50,000 |
Amounts are the ranges members report, not exact values. The STOCK Act gives members up to 45 days to disclose a trade, so trades appear weeks after they are made. See every member’s disclosed trades
In the 12 months to Oct 20, 2026, DXCM insiders made 1 open‑market purchase worth $138,563 by 1 insider and 30 sales worth $12.8 million, according to SEC Form 4 filings.
After the 3 insider purchases of $10,000 or more since 2012, DXCM beat the S&P 500 by an average of 167.9 percentage points over the next 12 months; every one was followed by a beat (a small sample). Across all 17,865 insider purchases in Exent’s study, the average was +17.2% and the median +1.0% against the index.
| Date | Insider | Role | Value |
|---|---|---|---|
| Nov 10, 2025 | Leach Jacob Steven | President & COO | $138,563 |
| Nov 7, 2017 | Altman Steven R | Director | $1.3 million |
| Nov 6, 2017 | Altman Steven R | Director | $496,100 |
| Jun 4, 2010 | Valdes Jorge A | SVP of Operations | $48,480 |
| May 17, 2010 | Lord Jonathan T Md | Director | $147,287 |
The table lists the latest open‑market purchases on record, leaving out the last 30 days. The chart counts Form 4 purchases and sales by calendar quarter. Purchases are open‑market buys; sales include planned sales under 10b5‑1 trading plans. Do insider buys beat the market?
As of the Sep 30, 2026 settlement date, 3.73% of DXCM’s float was sold short: 14.0 million shares, or 3.2 days of average trading volume to cover. A year earlier (Oct 15, 2025) it was 3.09%. The median across the 997 US stocks Exent tracks was 4.77%, so DXCM is less heavily shorted than most.
From FINRA short‑interest reports, filed twice a month; the bars show the short share of the float at each month‑end. Days to cover divides the shares short by the average daily volume. The most shorted stocks
At the end of Q2 2026 (Jun 30, 2026), 1,026 institutions reported holding DXCM in 13F filings, up 14 from the quarter before and up from 1,013 a year earlier. Their reported holdings add up to 101.1% of DXCM’s shares. In the quarter 523 institutions added to their positions and 349 cut them.
Investment managers with over $100 million in US equities file 13F reports within 45 days of each quarter end, so this is the latest complete quarter. Holdings can add up to more than 100% when shares are lent and counted twice. Which stocks institutions are buying and selling
DXCM’s diluted share count rose 4.0% over the five fiscal years to fiscal 2025 and fell 1.7% in fiscal 2025 alone. Each share now owns a smaller slice of the company. The median change across the 1,005 US stocks Exent tracks was −0.1%.
Stock‑based compensation was $159.6 million in fiscal 2025, 3.4% of revenue. DXCM spent $500.0 million buying back shares, a buyback yield of 1.57% of its market value; stock pay equaled 31.9% of the buybacks.
Weighted‑average diluted shares from DXCM’s annual income statements; stock‑based compensation and buybacks from its cash‑flow statement. Stock dilution and stock‑based compensation, explained
In Exent’s Oct 20, 2026 snapshot, DXCM’s Altman Z‑score was 7.46, in the safe zone (where 465 of the 794 non‑financial US stocks Exent tracks sit). Its Piotroski F‑score was 8 out of 9; 20% of scored stocks reach 8 or more.
The Altman Z‑score combines five balance‑sheet and earnings ratios into one bankruptcy‑risk score: below 1.81 is the distress zone, 1.81–2.99 grey, above 2.99 safe. It is not meaningful for banks, insurers and REITs. The Piotroski F‑score counts nine yes/no tests of profitability, leverage and efficiency; 8–9 is strong, 0–2 weak. Both come from the latest annual statements. Which stocks have the highest bankruptcy risk?
On its latest earnings call (Jul 30, 2026), DXCM’s executives and analysts mentioned AI 1 time, against 3 on the call before (Apr 30, 2026); the average across 455 S&P 500 calls that quarter was 12.9. Tariffs and recession did not come up.
| Mentions | Jul ’26 | Apr ’26 | Feb ’26 | Oct ’25 |
|---|---|---|---|---|
| AI | 1 | 3 | 2 | 0 |
| AI agents | 0 | 0 | 0 | 0 |
| Data centers | 0 | 0 | 0 | 0 |
| Tariffs | 0 | 0 | 0 | 0 |
| China | 0 | 0 | 0 | 0 |
| Recession | 0 | 0 | 0 | 0 |
Word counts in the full transcript of each call, prepared remarks and Q&A, newest first. “AI” also counts generative AI and large language models; “AI agents” counts agentic AI. Which companies talk most about AI?
As of Oct 20, 2026, 59 of the 304 ETFs Exent tracks held DXCM. Its largest weight is in FXH (First Trust Health Care AlphaDEX Fund), at 2.34% of the fund.
| ETF | Fund | Weight of DXCM |
|---|---|---|
| FXH | First Trust Health Care AlphaDEX Fund | 2.34% |
| IWP | iShares Russell Mid-Cap Growth ETF | 0.96% |
| VOT | Vanguard Mid-Cap Growth Index Fund | 0.77% |
| XLV | State Street Health Care Select Sector SPDR ETF | 0.51% |
| SPHQ | Invesco S&P 500 Quality ETF | 0.48% |
| VHT | Vanguard Health Care Index Fund ETF Shares | 0.47% |
| VO | Vanguard Mid-Cap Index Fund ETF Shares | 0.32% |
| FNDA | Schwab Fundamental U.S. Small Company Index ETF | 0.29% |
Owning several of these funds stacks the same position. How much do VOO, QQQ and VTI overlap?
Jacob Leach, DXCM’s President & Chief Executive Officer, received total pay of $8.0 million for fiscal 2025; for fiscal 2024, Kevin R. Sayer Chairperson received $15.8 million as CEO, according to the company’s proxy statement filed with the SEC on Apr 15, 2026. 74% of it came as stock and option awards, valued when they were granted rather than when they pay out. The median CEO pay across the 378 S&P 500 companies Exent tracks was $17.2 million, so DXCM’s CEO earned less than most.
| Pay component | Amount | Share of total |
|---|---|---|
| Salary | $768,962 | 9.6% |
| Stock and option awards | $5.9 million | 74.3% |
| Incentive plan (cash) | $1.2 million | 14.6% |
| Other | $116,156 | 1.5% |
| Other top executives | Role | Total pay, 2025 |
|---|---|---|
| Kevin Sayer | Executive Chairman | $16.3 million |
| Jereme Sylvain | EVP, Chief Financial Officer | $7.1 million |
| Jon Coleman | EVP, Chief Commercial Officer | $6.7 million |
| Michael Brown | EVP, Chief Legal Officer | $6.3 million |
Figures from the summary compensation table of the proxy statement; awards count at their grant‑date value, so one large multi‑year grant can make a single year stand out. CEO pay across the S&P 500
Exent matches every holding to the index with the most similar risk. For DXCM that is SPY (the S&P 500). Comparing a holding with an index that carries very different risk makes good results look bad and risky ones look clever. Read why the S&P 500 is the wrong benchmark for most portfolios.
| Ticker | Name | 5‑year return | Volatility (5y) |
|---|---|---|---|
| LLY | Eli Lilly and Company | +482.3% | 32.6% |
| JNJ | Johnson & Johnson | +92.9% | 16.8% |
| ABBV | AbbVie Inc. | +207.1% | 23.5% |
| UNH | UnitedHealth Group Incorporated | −3.3% | 32.7% |
| MRK | Merck & Co., Inc. | +97.8% | 23.6% |
| AMGN | Amgen Inc. | +163.1% | 24.8% |
| TMO | Thermo Fisher Scientific Inc. | +11.7% | 27.0% |
| GILD | Gilead Sciences, Inc. | +214.3% | 24.8% |
Returns are total returns from month‑end adjusted closing prices (dividends reinvested) through Oct 30, 2026. Crisis drawdowns and trailing maximum drawdowns use daily prices. Analyst coverage counts ratings published in the last 12 months, shown with a 30‑day delay. Full method: Exent methodology.
Company data as of Oct 20, 2026. The move around an earnings report runs from the close before it to the close after it; a price target counts as hit when the stock closed at or beyond it within 12 months (Exent analyst data). Revenue by region and segment, share counts and executive pay come from company filings; insider trades from SEC Form 4, short interest from FINRA, institutional ownership from 13F filings, Congress trades from STOCK Act disclosures filed with the House and Senate, federal contracts from USAspending.gov. Filings from the last 30 days are shown as counts only.
Past performance does not guarantee future results. Historical figures are calculated by Exent from market data and are for education only; they are not investment advice or a recommendation to buy or sell any security.
Wall Street’s average DXCM price target is 3.2% above the latest share price. See what the best‑ranked analysts on DXCM say now in Exent Gems.
Yes. DXCM returned +320.7% (+15.5% a year) over the 10 years to Oct 30, 2026, versus +316.3% (+15.3% a year) for the S&P 500, including dividends.
Yes. As of Oct 20, 2026, DXCM (DexCom, Inc.) is one of the 503 stocks in the S&P 500. It is also in the Nasdaq-100.
Yes. As of Oct 20, 2026, DXCM (DexCom, Inc.) is one of the 101 stocks in the Nasdaq-100.
DXCM fell −87.0% from peak to trough during the global financial crisis (2007–09), versus −56.5% for the S&P 500.
DXCM fell −36.8% from peak to trough during the covid crash (feb–mar 2020), versus −34.1% for the S&P 500.
DXCM fell −48.8% from peak to trough during the 2022 inflation bear market, versus −25.4% for the S&P 500.
Over the 5 years to Oct 30, 2026, DXCM’s Sharpe ratio was −0.09 and its Sortino ratio −0.13, versus 0.58 and 0.91 for the S&P 500.
DXCM’s 5‑year annualized volatility was 49.3%, higher than the S&P 500’s 17.0%, with a beta of 1.45.
Among large US stocks, the lowest correlations with DXCM over the last 60 months were UNH (−0.08), SO (−0.04), GLW (−0.02). Its correlation with long Treasuries (TLT) was 0.05 and with gold (GLD) 0.07.
DXCM beat the consensus earnings-per-share estimate in 10 of its last 12 quarterly reports through Jul 30, 2026, and the revenue estimate in 11 of 12. The stock moved 10.8% on average, up or down, from the close before each report to the close after it.
Jacob Leach, DXCM’s President & Chief Executive Officer, received $8.0 million in total pay for fiscal 2025, including a $768,962 salary and $5.9 million in stock and option awards valued at grant, according to the proxy statement filed with the SEC on Apr 15, 2026. The median S&P 500 CEO received $17.2 million.
Yes. As of Oct 20, 2026, 13 members of Congress had disclosed 58 trades in DXCM (29 buys and 29 sales) in STOCK Act disclosures filed with the House and Senate.
As of the Sep 30, 2026 settlement date, 3.73% of DXCM’s float was sold short (14.0 million shares, 3.2 days to cover), according to FINRA short-interest reports. A year earlier it was 3.09%.
Yes. DXCM’s diluted share count rose 4.0% over the five fiscal years to fiscal 2025 and fell 1.7% in the latest year. Stock-based compensation was 3.4% of revenue, and buybacks totaled $500.0 million.
Exent ranks Wall Street analysts by their track record. Gems shows who the top‑ranked analysts on DXCM are, their latest calls and the stocks where several of them agree.
Educational content, not investment advice. Examples are illustrative; past performance does not guarantee future results.