TOP TIERMARKET NEWSWIRE
Movers explained · 2026-09-02

Archived explainer. For the current picture see today's MIAX page.

Why Is MIAMI INTL HLDGS INC (MIAX) Stock Down Today?

By the Top Tier Newswire AI Desk · September 2, 2026 at 10:30 AM ET · reviewed against 2 wire stories

MIAMI INTL HLDGS INC (MIAX) is down -4.11% in the latest session. Our newswire has captured 2 stories on MIAX across 2 sources in the last 36 hours, with AI sentiment reading mixed (avg 45/100).

Public view, delayed 4h. Every headline, price and sentiment read below — and this write-up itself — reaches Pro subscribers live. Public readers see it once it clears the delay.

MIAX stock is down 4.11% at $40.38 as of the latest trade, following a downgrade from Morgan Stanley. The firm cut its rating to Equal Weight and lowered the price target to $50. The move reflects a shift in the firm’s assessment of the stock’s risk-reward balance, despite recent earnings and operational outperformance.

What Happened

Morgan Stanley’s downgrade is the primary catalyst for the stock’s decline. The firm cited a balanced risk-reward outlook, which led to the Equal Weight rating. This follows a recent earnings report in which Miami International Holdings beat estimates for both adjusted EPS and revenue. The stock opened at $42.11 but quickly moved lower, hitting a session low of $40.00 shortly after the market opened. The stock has traded in a narrow range since, with volume at 0.3 million shares, or 0.2 times the 3-month daily average. Meanwhile, other analysts have maintained or upgraded their ratings. Keefe, Bruyette & Woods raised its price target to $48 and maintained Market Perform, while Rosenblatt raised its target to $62 and kept a Buy rating.

What The Data Shows

MIAX has a market cap of $4.3 billion and a P/E ratio of 25.4. The stock is currently trading near its 52-week low of $34.02, having printed six fresh 52-week lows on September 2. Over the past 30 days, sentiment has deteriorated, falling to 48 out of 100 from an average of 54. Insiders have been active sellers, with three executives and directors reporting sales totaling $38.2 million in the last 90 days. The most recent insider transaction was reported on August 20.

What To Watch

The stock is set to continue under coverage from multiple analysts, with a range of price targets from $48 to $62. Investors may look for further commentary from rating firms or potential earnings surprises to gauge the stock’s direction.

AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Public view is delayed 4 hours from real time. Not financial advice.

MIAX by the numbers

Last: $40.38Session: -4.11%7 sessions: -7.74%Coverage: 2 stories / 2 sourcesAI sentiment: 45/100 (mixed)Mkt cap: $4.3BP/E: 25.452w: $34.02 to $57.14
MIAX · Sep 2 session (5-min) · -3.54% vs prior close · updated 8:45 PM ET
$39.51$40.91$42.30prev close $42.11$40.628:00 AM10:45 AM1:30 PM4:15 PM7:00 PM8:00 AM · $42.119:00 AM · $42.159:25 AM · $41.969:30 AM · $40.879:35 AM · $40.849:40 AM · $41.419:45 AM · $41.199:50 AM · $40.909:55 AM · $40.5510:00 AM · $40.7210:05 AM · $40.5810:10 AM · $40.5610:15 AM · $40.5510:20 AM · $40.7810:25 AM · $40.3810:30 AM · $40.2610:35 AM · $40.4510:40 AM · $40.5610:45 AM · $40.6910:50 AM · $40.8010:55 AM · $40.7811:00 AM · $40.7711:05 AM · $40.8411:10 AM · $40.8711:15 AM · $40.9311:20 AM · $40.7411:25 AM · $40.7311:30 AM · $40.5911:35 AM · $40.6111:40 AM · $40.6311:45 AM · $40.4311:50 AM · $40.4411:55 AM · $40.4312:00 PM · $40.5112:05 PM · $40.4312:10 PM · $40.4812:15 PM · $40.4612:20 PM · $40.2812:25 PM · $40.3112:30 PM · $40.4512:35 PM · $40.4412:40 PM · $40.4712:45 PM · $40.4812:50 PM · $40.3212:55 PM · $40.111:00 PM · $40.201:05 PM · $40.221:10 PM · $40.131:15 PM · $40.131:20 PM · $40.091:25 PM · $39.871:30 PM · $39.881:35 PM · $39.661:40 PM · $39.881:45 PM · $40.011:50 PM · $39.971:55 PM · $40.002:00 PM · $40.012:05 PM · $40.082:10 PM · $40.202:15 PM · $40.222:20 PM · $40.202:25 PM · $40.232:30 PM · $40.312:35 PM · $40.322:40 PM · $40.422:45 PM · $40.342:50 PM · $40.312:55 PM · $40.303:00 PM · $40.313:05 PM · $40.283:10 PM · $40.433:15 PM · $40.423:20 PM · $40.373:25 PM · $40.533:30 PM · $40.503:35 PM · $40.473:40 PM · $40.483:45 PM · $40.553:50 PM · $40.453:55 PM · $40.654:00 PM · $40.624:05 PM · $40.624:10 PM · $40.624:55 PM · $40.626:30 PM · $40.627:00 PM · $40.62
AI sentiment, last 36h · averaged over 2 stories · 45/100 bearish
AI sentiment 45/100 (bearish)0 · bearish50bullish · 100

The headlines behind the move

Story flow · 2 stories on the wire, last 36h · hover or tap a dot for the headline
36h ago24h ago12h agopublishInvesting.com Analyst Ratings · sentiment 42 · Morgan Stanley cuts Miami International Holdings stock rating on balanced risk-reward outlookInvesting.com Analyst Ratings · 42Morgan Stanley cuts Miami International Holdings stock rating on balanced risk-reward out…The Fly · sentiment 48 · Miami International downgraded to Equal Weight at Morgan StanleyThe Fly · 48Miami International downgraded to Equal Weight at Morgan Stanley
12d agoThe FlyNEUTRAL 48Analyst

Miami International downgraded to Equal Weight at Morgan Stanley

12d agoInvesting.com Analyst RatingsBEARISH 42Analyst

Morgan Stanley cuts Miami International Holdings stock rating on balanced risk-reward outlook

Morgan Stanley cuts Miami International Holdings stock rating on balanced risk-reward outlook

Want the next move before the crowd? The live terminal streams every headline in real time with watchlist alerts, AI sentiment, and the full data stack behind this page.Get Pro Access →

More on MIAX: full news and sentiment history. Sentiment scores are AI-derived research signals, not financial advice.

Earlier MIAX move explainers: 2026-09-02