Why is TSM stock down?

TSM is down 9.0% over five trading days, closing at $412.61 on Oct. 16, 2026. When a stock drops like this, the first question is whether the problem is the company or the whole group it trades with.

To answer that, we compare TSM with its closest peers, check the calendar for earnings and Fed dates, and go through Taiwan Semiconductor Manufacturing Co Ltd's latest SEC filings and insider trades.

The chart below tracks TSM's daily closing price from April 22, 2026 to Oct. 16, 2026. Over that stretch it is up 7.0%, from $385.54 to $412.61, with a high of $485.80 on Oct. 5, 2026 and a low of $373.68 on July 29, 2026. Each red dot marks a day company insiders sold shares on the open market (2 days in this period); each green dot a day they bought (20 days).

TSM vs peers this week

The table below shows how TSM stacks up against its peers this week. Over 5 days, MSFT did best (-1.1%) and AMD worst (-13.0%). TSM ranks 5 of 7.

What could be behind the TSM move

We found no Taiwan Semiconductor Manufacturing Co Ltd earnings report within the last 10 days or next three weeks, and no notable SEC filing in recent weeks, so nothing company-specific on the public record explains the move on its own.

Across the broader market, the backdrop is an uptrend under stress, with the VIX volatility index at 16.46. The Federal Reserve's next rate decision is on Oct. 28, 2026, 10 days away; market pricing puts the odds at 85% for a hold, 14% for a hike and 1% for a cut.

Also worth knowing about TSM

Live TSM data, updated every 30 minutes: TSM insider trades, ownership and filings →

What would change the picture for TSM

These are the specific events and levels to watch. None of them is a prediction.

• Insider buying: 30 insiders bought $1.5 million in 90 days. More purchases would strengthen that signal; sales by the same people would weaken it.
• Analyst ratings: the average score moved from 4.21 to 4.23 over three months (on a scale where 5 is strong buy and 1 is strong sell). A run of downgrades after earnings usually shows up here first.
• Price levels: a close above $485.8 would be a new 52-week high, 17.7% above the latest close of $412.61; a close below $272.25 would be a new 52-week low, 34.0% below it.
• Growth: revenue rose 36.4% year over year in the quarter ending Sep 2026 (trend: accelerating). At a P/E of 4.7, a slowdown would matter more than at a lower multiple.
• New shares: dilution risk is low now. A new shelf registration (S-3) or a prospectus supplement (424B) for an offering would raise it.

How TSM compares with its peers

Over the past month TSM ranks 3 of 6 in this group (-4.1%); the best was NVDA (-2.4%) and the weakest INTC (-17.4%).

TSM's P/E of 4.7 is below the peers' median of 34.5, so investors pay less for each dollar of its profit.

A dash in the P/E column means the company lost money over the last 12 months, so it has no P/E.

TSM history: what happened after similar moves

Since 2023, TSM fell 10% or more in a month 5 times (separate episodes, not counting the current one). Three months later it was higher in 3 of 4 cases; the median change was +29.6%.

Past moves don't predict the next one; they show how volatile the stock has been.

Questions people also ask

What is TSM's 52-week high and low?

Over the past year TSM closed as high as $485.8 and as low as $272.25. At $412.61 (Oct. 16, 2026) it is down 15.1% from the high and 51.6% above the low.

Do analysts think TSM is a buy?

41 of the 43 analysts who cover Taiwan Semiconductor Manufacturing Co Ltd rate it a buy or strong buy, for a consensus of Buy. Ratings describe analysts' views, not a guarantee, and they change after earnings.

Is Taiwan Semiconductor Manufacturing Co Ltd issuing new shares?

Dilution risk reads low (0/100); the share count fell 0.0% in a year.

Is Taiwan Semiconductor Manufacturing Co Ltd profitable?

Yes. Taiwan Semiconductor Manufacturing Co Ltd had $4.95 trillion of revenue over the last 12 months with a net margin of 51.5% and a P/E of 4.7.

Does TSM pay a dividend?

Taiwan Semiconductor Manufacturing Co Ltd reported no dividend payments over the last 12 months in its SEC filings.

Who is the largest shareholder of TSM?

Among investment managers that file Form 13F, Pacer Advisors, Inc. reported the largest TSM position ($18,843). 1 institutions reported holding TSM for Q2 2026.

Dates to watch for TSM

Insider trades can come any day: they must be filed on Form 4 within two business days.

Key terms on this page

P/E ratio

Price divided by the last 12 months of earnings per share. A P/E of 20 means investors pay $20 for each $1 of yearly profit. It is only defined when the company is profitable.

Form 4

The SEC form a company's officers, directors and 10% owners must file within two business days of buying or selling its stock.

Open-market trade

A purchase or sale on the exchange at the market price, paid with the insider's own money (code P or S on Form 4), as opposed to option exercises, grants or gifts.

Form 13F

A quarterly SEC report listing the U.S. stock holdings of every investment manager with more than $100 million. It is due 45 days after each quarter ends, so it shows positions with a delay.

Dilution

When a company issues new shares, each existing share owns a smaller piece of the company. Common sources: stock offerings, convertible debt and large stock-based pay.

52-week high / low

The highest and lowest daily closing price over the past year (about 252 trading days).

Analyst consensus

The average of Wall Street analysts' ratings (strong buy to strong sell). Analysts skew positive, so a hold is often read as a cautious view.

Where these numbers come from

Every number on this page is computed from the data when the page is refreshed (usually daily); nothing is typed in by hand. This is information, not investment advice.

• Price: daily closing prices through Oct. 16, 2026; changes use 5, 21 and 63 trading days; the 52-week range uses the last 252 closes.
• Insider trades: SEC Form 4 filings for the last 90 days, counting only open-market purchases (code P) and sales (code S); option exercises, grants, gifts and filings with data errors are left out.
• Analyst ratings: counts of current ratings from 43 analysts, compared with three months ago.
• Earnings dates and estimates: a market-data calendar; reported vs expected EPS for the last 4 quarters.
• Valuation and growth: revenue, earnings, margins and share counts from the company's SEC filings (XBRL data, latest quarter Sep 2026); P/E and price/sales use the latest close.
• Fund ownership: SEC Form 13F filings for Q2 2026.
• Dilution: share-count changes and offering-related SEC filings (shelf registrations, prospectus supplements, convertible notes) over two years, scored 0-100.
• History: 21-trading-day moves over about three years of daily closes, counted once per episode.