MKTX vs SEIC Stock Comparison
Compare MKTX and SEIC across AIQ Score, fundamentals, valuation, momentum, risk, analyst expectations and current market evidence.
What is the main difference between MKTX and SEIC?
MKTX leads the current stock comparison as MarketAxess Holdings Inc., with the clearest separation coming from momentum and the broader AIQ evidence mix.
AlgovestIQ AIQ Comparison
MarketAxess Holdings Inc. vs SEI Investments Company
MKTX leads
MKTX leads by 2 AIQ points, primarily on Momentum, having only recently taken the lead back from SEIC. Wall Street currently favors SEIC on target upside.
Fragile: 0 of 6 evidence groups support MKTX, and the lead recently changed hands.
MarketAxess Holdings Inc.
SEI Investments Company
The Algovestiq AIQ Score currently favors MKTX over SEIC, 65 versus 63 as of Sep 11, 2026. MKTX's advantage is driven primarily by stronger momentum, while SEIC holds the stronger quality profile. MKTX also shows the stronger technical structure relative to its 50-day moving average, though analyst target upside currently favors SEIC. 0 of 6 covered evidence groups favor MKTX today, and the comparison is rated Fragile on stability: the AIQ gap is narrow at 2 points. MKTX lead: Reversed — SEIC led by 14 AIQ points 30 sessions ago; MKTX now leads by 2.
Compare MarketAxess Holdings Inc. and SEI Investments Company across the Algovestiq AIQ Score, valuation, quality, momentum, risk, technicals and analyst expectations.
Performance over time
Price-return comparison using available daily close history.
Total return comparison
Growth of $10,000
Based on available close-price history. Distribution reinvestment is not added unless already reflected in the source series.
Compare MKTX and SEIC against another ticker
Open a multi-ticker workspace without changing this focused pair page.
AIQ Factor Divergence
Where the two separate, on the four dimensions behind the AIQ Score. Bars read outward from a shared zero: further from the centre is a wider gap.
- Momentum74 vs 57MKTX +17
- Quality83 vs 88SEIC +5
- Value28 vs 31Even
- Risk Resilience86 vs 85Even
0 of 6 evidence groups favor MKTX. MKTX’s edge is concentrated in momentum; SEIC keeps a meaningful quality edge.
What changed since the last close
Latest scored session 2026-09-10, compared against the prior scored session 2026-09-09.
Largest factor move: Risk Resilience +1
No new signals fired.
Largest factor move: Momentum -2
No new signals fired.
MKTX's lead was unchanged in the latest snapshot.
Deeper signal detail for each name lives on its own signals page — MKTX and SEIC both carry a full feed there.
The central trade-off
MKTX (MarketAxess Holdings Inc.): the stronger current systematic profile, led by momentum.
SEIC (SEI Investments Company): the counter-case, on quality, fundamentals, technicals — but at materially higher volatility, 16.5% against 2.5%.
The AIQ Score and Wall Street therefore point in different directions on this pair.
Which one fits your objective
The same two names rank differently depending on what you are optimizing for. All six reads are shown at once — none of them is hidden behind a toggle.
Balanced
MKTXMKTX on the overall AIQ Score, which weights Quality and Value most heavily.
Growth
SEICSEIC on combined revenue and EPS growth.
Value
EvenThe two are level on Value.
Momentum
MKTXMKTX on the Momentum factor, by 17 points.
Lower downside
MKTXMKTX carries the lower 1-month annualized volatility.
Analyst upside
SEICSEIC on implied upside to the consensus price target.
AIQ vs Wall Street
The model and the Street disagree here: AIQ favors MKTX, analyst targets favor SEIC. That disagreement is the most useful thing on this page.
| Measure | MKTX | SEIC | Note |
|---|---|---|---|
| Implied upside to target | -3.6% | +4.4% | SEIC has more room |
| Target dispersion | +55.3% | +38.5% | Lower is tighter analyst agreement |
| Consensus | Hold | Buy | Context, not a primary driver |
| Analysts covering | 6 | 3 | Higher coverage generally improves confidence |
The two are measuring different things. The AIQ Score reads current fundamentals, valuation, trend and risk; analyst targets price forward expectations. A divergence of this kind is either a contrarian opportunity or a sign the model is missing something already priced in — it is worth resolving before acting on either.
Analyst targets are expectations, not predictions. Dispersion matters as much as the midpoint.
AIQ Agreement Matrix
0 of 6 covered evidence groups favor MKTX. A wide gap backed by one group is a weaker case than a narrow gap backed by five.
| Evidence group | Favors | Reading |
|---|---|---|
| AIQ Score | Even | 65 vs 63 |
| Fundamentals | SEICon balance | revenue growth -6.4% vs 3.7%; EPS growth -12.7% vs 14%; TTM ROE 24.7% vs 28.9%; gross margin 67.5% vs 67.3%; operating margin 40.5% vs 29% — SEIC takes 3 of 4 decided legs, not all of them |
| Valuation | Even | Value 28 vs 31 |
| Technicals | SEIC | Price vs 50-day 13.2% vs 3.5%; vs 200-day 3.9% vs 19.8% |
| Risk Resilience | Even | Risk Resilience 86 vs 85 |
| Analyst expectations | SEIC | Target upside -3.6% vs 4.4% |
✓ agrees with the overall verdict · ✕ points the other way. Groups marked “not covered” lack data on one or both of MKTX and SEIC and are excluded from the count.
AIQ Decision Stability
The conclusion is sensitive to small changes. Treat the lead as provisional and watch the flip conditions below.
- The AIQ gap is narrow at 2 points. (argues the conclusion is provisional)
- Only 0 of 6 covered evidence groups agree. (argues the conclusion is provisional)
- The lead has already changed hands inside the comparison window. (argues the conclusion is provisional)
- Signal direction runs against the verdict: the leader is net-bearish while the laggard is net-bullish. (argues the conclusion is provisional)
Stability combines the score gap, how broadly the evidence agrees, how steady the lead has been across daily snapshots, the current signal state on both names, and analyst dispersion on MKTX.
How the comparison changed
119 daily snapshots · May 4 – Sep 10MKTX lead: Reversed — SEIC led by 14 AIQ points 30 sessions ago; MKTX now leads by 2.
- Today
- MKTX +2
- 65 vs 63
- 7 sessions ago
- SEIC +4
- 64 vs 68
- 30 sessions ago
- SEIC +14
- 55 vs 69
- 90 sessions ago
- SEIC +15
- 54 vs 69
The lead changed hands once in this window, most recently on Sep 9 when MKTX moved ahead of SEIC.
AIQ Signal Divergence
Only the signals that bear on the head-to-head. A conflicted name is carrying bullish and bearish rules at the same time — the technical evidence is not pointing one way.
0 bullish / 3 bearish / 2 neutral
- Death Cross Active — bearish, trend, long horizon (9.01%)
- Bollinger Band Squeeze — neutral, volatility, short horizon
- RSI Overbought — bearish, momentum, short horizon
3 bullish / 1 bearish, conflicted
- Golden Cross Active — bullish, trend, long horizon (16.00%)
- EMA Ribbon Expansion Bullish — bullish, trend, medium horizon
- Uptrend Structure Active — bullish, trend, long horizon
SEIC is conflicted, so the timing case there is weaker than the score alone suggests.
Price vs model alignment
Whether the latest session's price move confirms what the model did over the same session, or contradicts it.
Neither the price nor the AIQ Score moved enough in the latest session to confirm or contradict the other (price -0.06%, AIQ 0 points).
Neither the price nor the AIQ Score moved enough in the latest session to confirm or contradict the other (price +0.15%, AIQ 0 points).
What would flip this result
A state, not a forecast. These are the specific, observable changes that would reverse the verdict — not a price prediction.
- 1SEIC closes the Momentum gap — currently 17 points behind, the largest single contributor to MKTX's edge.
- 2SEIC generates a confirmed bullish trend signal it does not currently carry, such as MACD Bullish Crossover.
- 3MKTX starts generating bearish momentum or trend signals.
- 4A regime shift changes factor weighting — Quality and Value carry the heaviest weights in the composite, so a rotation toward either would move the result most.
The full evidence
Every number behind the verdict. The leader is called above each group so you are not left to solve it from the table.
Fundamentals
SEIC leads on balance| Metric | MKTX | SEIC |
|---|---|---|
| Revenue growth (YoY) | -6.4% | 3.7% |
| EPS growth (YoY) | -12.7% | 14% |
| Gross margin | 67.5% | 67.3% |
| Operating margin | 40.5% | 29% |
| Return on equity (TTM) | 24.7% | 28.9% |
| Debt to equity | 0.14 | 0.03 |
Performance
SEIC leads 4 of 6 windows| Metric | MKTX | SEIC |
|---|---|---|
| 1 week (5 sessions) | 0.2% | -2.2% |
| 1 month (20 sessions) | 0.3% | 1.2% |
| 3 months (63 sessions) | 39.9% | 20.2% |
| 6 months (126 sessions) | -8.9% | 34.1% |
| Year to date | -10% | 30.2% |
| 1 year (252 sessions) | -12.9% | 22.1% |
Technicals
SEIC has the stronger structure| Metric | MKTX | SEIC |
|---|---|---|
| RSI (14) | 78.7 | 47 |
| ADX (14) | 67.8 | 38.3 |
| Price vs 50-day | 13.2% | 3.5% |
| Price vs 200-day | 3.9% | 19.8% |
| Volatility (1M, annualized) | 2.5% | 16.5% |
Risk
Split| Metric | MKTX | SEIC |
|---|---|---|
| Beta | 0.08 | 0.57 |
| Sharpe ratio | -0.28 | 0.85 |
| Sortino ratio | -0.59 | 1.44 |
| Max drawdown | -43.6% | -15.2% |
| Current drawdown | -15.8% | -4.3% |
| Annualized volatility | 39.9% | 23% |
| Value at risk (95%) | -2.8% | -1.9% |
Straight answers
Each answer is regenerated from the current snapshot, not written once and left to age.
Which is better, MKTX or SEIC?
On the Algovestiq AIQ Score, MKTX is the stronger of the two as of Sep 11, 2026, scoring 65 against SEIC's 63. The edge comes from momentum. SEIC is not without a case — it holds the better quality profile, which matters more if that is the objective you are optimizing for. This is a systematic score, not a recommendation: it ranks the two on the same evidence, it does not know your holding period or tax position.
Is MKTX or SEIC the better buy right now?
MKTX carries the stronger systematic profile as of Sep 11, 2026, and the comparison is rated Fragile — 0 of 6 covered evidence groups agree. A Fragile rating means the conclusion is sensitive: the AIQ gap is narrow at 2 points. Treat the lead as provisional.
Why does the AIQ Score favor MKTX over SEIC?
The composite weights Quality, Value, Momentum and Risk Resilience. MKTX leads Momentum by 17 points; SEIC leads Quality by 5 points. Where the two split, the factor with the larger weight carries the result.
Which has more analyst upside, MKTX or SEIC?
Analyst price targets imply -3.6% upside for MKTX and +4.4% for SEIC, so the Street currently favors SEIC. That points the opposite way to the AIQ Score, which favors MKTX. The two are measuring different things: the model reads current fundamentals, valuation, trend and risk; the Street is pricing forward expectations. A divergence of this kind is either a contrarian opportunity or a sign the model is missing something the analysts have already priced — it is the single most useful row on this page to investigate. Analyst targets are expectations, not predictions, and dispersion matters as much as the midpoint.
Which is better value, MKTX or SEIC?
Neither name separates on the peer-relative Value factor. The two are level on Value. The Value factor reads valuation relative to sector peers and to the company's own fundamental quality, so it is not the same as simply having the lower multiple.
Which has stronger growth, MKTX or SEIC?
SEIC on combined revenue and EPS growth. Growth here is measured on reported revenue and earnings, not on forward estimates — it describes what the businesses have delivered, not what the Street expects next.
Which has stronger momentum, MKTX or SEIC?
MKTX on the Momentum factor, by 17 points. Momentum is one of the four weighted factors in the AIQ composite. It has documented persistence over three- to twelve-month horizons, which makes it a timing input rather than a reason to hold something indefinitely.
Which is riskier, MKTX or SEIC?
MKTX is the more resilient of the two, so the other name carries the higher downside risk. MKTX carries the lower 1-month annualized volatility. Risk Resilience is a weighted factor in the composite; position sizing usually responds to it more usefully than the buy/avoid decision does.
Is MKTX more profitable than SEIC?
The profitability evidence is mixed: gross margin 67.5% vs 67.3%; operating margin 40.5% vs 29%; ttm roe 24.7% vs 28.9%. Each name leads on one measure, and there is no single profitability composite that resolves the split — which of the two reads as "more profitable" depends on whether you weight pricing power or operating leverage.
Is MKTX's lead over SEIC getting stronger or weaker?
MKTX lead: Reversed — SEIC led by 14 AIQ points 30 sessions ago; MKTX now leads by 2. This is measured from 119 daily comparison snapshots between 2026-05-04 and 2026-09-10. The lead has changed hands once in that window, most recently on 2026-09-09, when MKTX moved ahead of SEIC.
What would change the MKTX vs SEIC verdict?
The result is a state, not a forecast, so it changes when the underlying evidence changes. Concretely: SEIC closes the Momentum gap — currently 17 points behind, the largest single contributor to MKTX's edge; SEIC generates a confirmed bullish trend signal it does not currently carry, such as MACD Bullish Crossover; MKTX starts generating bearish momentum or trend signals; a regime shift changes factor weighting — Quality and Value carry the heaviest weights in the composite, so a rotation toward either would move the result most.
What do the current signals say about MKTX and SEIC?
MKTX: 0 bullish / 3 bearish / 2 neutral. SEIC: 3 bullish / 1 bearish, conflicted. A conflicted state means bullish and bearish rules are active on the same name at once — the technical evidence is not pointing one way, and a decision taken on it carries more timing risk. The most decision-relevant rule on MKTX is Death Cross Active (bearish, long horizon). On SEIC it is Golden Cross Active (bullish, long horizon).
Compare MKTX and SEIC with others
Continue your research
This page answers which of the two. These answer the questions on either side of it.
How this comparison is scored
The Algovestiq AIQ Score composites four factors — Quality, Value, Momentum and Risk, each carrying a fixed weight. Sentiment is reported separately as SentimentPulse and is not folded into the composite. Scores refresh every trading day, and this page regenerates from the latest snapshot rather than being written once.
The verdict names a leader, states how broadly six independent evidence groups agree, and rates how durable that conclusion is given the score gap, its recent trajectory and the current signal state on both names.
How to use side-by-side comparison →This comparison is informational and educational, not investment advice. AIQ scores update daily; re-check after earnings, guidance or macro data that materially changes either name’s factor profile.