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MRK Short Squeeze Risk Tracker: Data and Analysis

Last Updated: 2025-11-28

Access the latest MRK short interest history, Days to Cover (DTC) trend, and the proprietary Short Squeeze Score for risk assessment.

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Short Squeeze Risk Assessment

MRK Short Squeeze Score

0.14

Very low short squeeze risk. Short interest is negligible, and market pressure is not high.

The Squeeze Score quantifies the current short squeeze risk by analyzing short interest, Days to Cover, and market liquidity. Use this score to quickly identify the most shorted stocks with the highest squeeze potential.

  • 0.0–0.2: Very low short squeeze risk.
  • 0.2–0.4: Low short squeeze potential.
  • 0.4–0.6: Moderate short squeeze risk.
  • 0.6–0.8: High short squeeze risk.
  • 0.8–1.0: Extreme short squeeze risk.

Short Interest Ratio (% of Float)

1.29%

The Short Interest Ratio (or % of Float) is the most critical metric for identifying the most shorted stocks. It reflects the percentage of available trading shares currently sold short.

Interpretation:

  • 0%–5%: Very low short interest, minimal squeeze risk.
  • 5%–10%: Moderate short interest, watch for trends.
  • 10%–20%: High short interest, potential for squeeze.
  • >20%: Extremely high, short squeeze risk elevated.

Key Short Selling Metrics

Total Short Interest Shares
31,943,311
Shares sold short as of 2025-11-28

High short interest, indicating significant bearish sentiment.

Days to Cover (DTC)
1.77

Short interest ÷ average daily volume.

Covering short positions would take less than 2 days, suggesting ease of covering.

Bi-weekly Change in Short Interest
15.63%
4317160
Vs previous report.

Significant increase in short interest, suggesting volatility.

Historical Data Coverage
166

Bi-weekly observations in the stored history.

High coverage with extensive historical data, trends are more reliable for analysis.

Short Interest Historical Charts

Explore the short interest trend, bi-weekly changes, and Days to Cover (DTC). Use the range selector to view different historical windows.

Short Interest (Total Shares)

Bi-Weekly Change (%)

Days to Cover (DTC)

Full Short Interest History (FINRA Bi-Weekly)

Complete FINRA bi-weekly short interest history for MRK.
This table includes total short interest, prior period values, percentage change,average daily volume, and Days to Cover (DTC), a key indicator of potential short squeeze risk.
Date Short Interest Prior Change % Change # Avg Volume DTC
2025-11-28 31,943,311 27,626,151 15.63% 4,317,160 18,022,575 1.77
2025-11-14 27,626,151 25,815,354 7.01% 1,810,797 12,867,044 2.15
2025-10-31 25,815,354 26,700,419 -3.31% -885,065 10,250,522 2.52
2025-10-15 26,700,419 25,174,694 6.06% 1,525,725 12,669,726 2.11
2025-09-30 25,174,694 27,709,865 -9.15% -2,535,171 14,294,134 1.76
2025-09-15 27,709,865 23,829,923 16.28% 3,879,942 11,593,137 2.39
2025-08-29 23,829,923 25,529,478 -6.66% -1,699,555 11,677,912 2.04
2025-08-15 25,529,478 25,879,122 -1.35% -349,644 10,347,050 2.47
2025-07-31 25,879,122 28,773,023 -10.06% -2,893,901 13,142,729 1.97
2025-07-15 28,773,023 35,092,687 -18.01% -6,319,664 13,815,461 2.08
2025-06-30 35,092,687 35,799,415 -1.97% -706,728 21,953,694 1.60
2025-06-13 35,799,415 34,564,617 3.57% 1,234,798 13,736,295 2.61
2025-05-30 34,564,617 41,266,612 -16.24% -6,701,995 13,015,493 2.66
2025-05-15 41,266,612 37,137,335 11.12% 4,129,277 15,862,063 2.60
2025-04-30 37,137,335 41,933,919 -11.44% -4,796,584 17,355,015 2.14
2025-04-15 41,933,919 37,936,527 10.54% 3,997,392 17,976,827 2.33
2025-03-31 37,936,527 37,125,881 2.18% 810,646 18,672,621 2.03
2025-03-14 37,125,881 40,943,400 -9.32% -3,817,519 16,100,690 2.31
2025-02-28 40,943,400 32,207,979 27.12% 8,735,421 16,829,624 2.43
2025-02-14 32,207,979 29,603,048 8.80% 2,604,931 22,531,042 1.43
2025-01-31 29,603,048 34,124,663 -13.25% -4,521,615 12,570,208 2.36
2025-01-15 34,124,663 30,926,600 10.34% 3,198,063 9,053,022 3.77
2024-12-31 30,926,600 32,027,522 -3.44% -1,100,922 10,511,424 2.94
2024-12-13 32,027,522 32,788,187 -2.32% -760,665 13,075,455 2.45
2024-11-29 32,788,187 26,322,944 24.56% 6,465,243 14,326,465 2.29
2024-11-15 26,322,944 26,228,480 0.36% 94,464 9,994,292 2.63
2024-10-31 26,228,480 26,041,803 0.72% 186,677 10,298,616 2.55
2024-10-15 26,041,803 27,261,544 -4.47% -1,219,741 8,609,042 3.02
2024-09-30 27,261,544 24,814,031 9.86% 2,447,513 10,588,285 2.57
2024-09-13 24,814,031 25,914,739 -4.25% -1,100,708 9,601,406 2.58
2024-08-30 25,914,739 24,811,334 4.45% 1,103,405 7,262,655 3.57
2024-08-15 24,811,334 26,717,858 -7.14% -1,906,524 10,365,041 2.39
2024-07-31 26,717,858 24,568,947 8.75% 2,148,911 10,695,372 2.50
2024-07-15 24,568,947 23,350,136 5.22% 1,218,811 6,563,150 3.74
2024-06-28 23,350,136 19,473,077 19.91% 3,877,059 15,041,684 1.55
2024-06-14 19,473,077 20,407,404 -4.58% -934,327 6,783,824 2.87
2024-05-31 20,407,404 20,265,716 0.70% 141,688 8,371,146 2.44
2024-05-15 20,265,716 18,754,018 8.06% 1,511,698 6,806,765 2.98
2024-04-30 18,754,018 20,429,972 -8.20% -1,675,954 7,551,651 2.48
2024-04-15 20,429,972 19,592,222 4.28% 837,750 6,246,795 3.27
2024-03-28 19,592,222 23,155,920 -15.39% -3,563,698 9,744,704 2.01
2024-03-15 23,155,920 16,604,734 39.45% 6,551,186 12,659,181 1.83
2024-02-29 16,604,734 16,818,374 -1.27% -213,640 6,293,967 2.64
2024-02-15 16,818,374 17,017,794 -1.17% -199,420 7,441,783 2.26
2024-01-31 17,017,794 20,814,150 -18.24% -3,796,356 7,839,892 2.17
2024-01-12 20,814,150 17,866,683 16.50% 2,947,467 8,635,333 2.41
2023-12-29 17,866,683 13,467,306 32.67% 4,399,377 6,974,790 2.56
2023-12-15 13,467,306 16,691,624 -19.32% -3,224,318 10,762,231 1.25
2023-11-30 16,691,624 18,021,513 -7.38% -1,329,889 9,408,394 1.77
2023-11-15 18,021,513 16,406,535 9.84% 1,614,978 6,651,148 2.71
2023-10-31 16,406,535 15,792,145 3.89% 614,390 8,079,167 2.03
2023-10-13 15,792,145 14,830,810 6.48% 961,335 6,155,375 2.57
2023-09-29 14,830,810 13,878,917 6.86% 951,893 5,428,750 2.73
2023-09-15 13,878,917 14,640,511 -5.20% -761,594 6,753,545 2.06
2023-08-31 14,640,511 14,458,322 1.26% 182,189 6,371,876 2.30
2023-08-15 14,458,322 14,136,825 2.27% 321,497 7,681,381 1.88
2023-07-31 14,136,825 17,923,981 -21.13% -3,787,156 7,405,172 1.91
2023-07-14 17,923,981 16,857,440 6.33% 1,066,541 7,184,000 2.49
2023-06-30 16,857,440 14,958,159 12.70% 1,899,281 9,206,210 1.83
2023-06-15 14,958,159 15,648,576 -4.41% -690,417 7,310,106 2.05
2023-05-31 15,648,576 19,617,100 -20.23% -3,968,524 7,197,314 2.17
2023-05-15 19,616,990 19,104,521 2.68% 512,469 5,763,703 3.40
2023-04-28 19,104,521 21,337,832 -10.47% -2,233,311 6,252,115 3.06
2023-04-14 21,337,832 22,071,464 -3.32% -733,632 6,503,716 3.28
2023-03-31 22,071,464 19,544,549 12.93% 2,526,915 9,350,513 2.36
2023-03-15 19,544,549 20,552,580 -4.90% -1,008,031 9,487,439 2.06
2023-02-28 20,552,580 19,469,717 5.56% 1,082,863 7,245,609 2.84
2023-02-15 19,469,717 17,148,771 13.53% 2,320,946 9,042,855 2.15
2023-01-31 17,148,771 16,218,086 5.74% 930,685 8,135,828 2.11
2023-01-13 16,218,086 17,210,478 -5.77% -992,392 9,250,353 1.75
2022-12-30 17,210,478 20,510,464 -16.09% -3,299,986 8,419,993 2.04
2022-12-15 20,510,464 19,633,252 4.47% 877,212 9,474,657 2.16
2022-11-30 19,633,252 19,467,627 0.85% 165,625 9,417,835 2.08
2022-11-15 19,467,627 20,358,398 -4.38% -890,771 9,722,762 2.00
2022-10-31 20,358,398 19,236,325 5.83% 1,122,073 10,288,103 1.98
2022-10-14 19,236,325 20,401,626 -5.71% -1,165,301 9,149,999 2.10
2022-09-30 20,401,626 19,448,809 4.90% 952,817 8,586,844 2.38
2022-09-15 19,448,809 19,293,573 0.80% 155,236 7,590,986 2.56
2022-08-31 19,293,573 19,761,346 -2.37% -467,773 6,857,357 2.81
2022-08-15 19,761,346 16,789,912 17.70% 2,971,434 8,666,376 2.28
2022-07-29 16,789,912 20,333,172 -17.43% -3,543,260 9,187,655 1.83
2022-07-15 20,333,172 20,467,105 -0.65% -133,933 8,650,104 2.35
2022-06-30 20,467,105 19,947,796 2.60% 519,309 16,227,909 1.26
2022-06-15 19,947,796 23,346,249 -14.56% -3,398,453 9,845,496 2.03
2022-05-31 23,346,249 21,568,730 8.24% 1,777,519 13,305,093 1.75
2022-05-13 21,568,730 16,975,589 27.06% 4,593,141 11,821,897 1.82
2022-04-29 16,975,589 19,280,197 -11.95% -2,304,608 10,906,220 1.56
2022-04-14 19,280,197 16,857,742 14.37% 2,422,455 13,136,944 1.47
2022-03-31 16,857,742 16,588,178 1.63% 269,564 10,187,393 1.65
2022-03-15 16,588,178 19,457,117 -14.74% -2,868,939 10,339,735 1.60
2022-02-28 19,457,117 17,652,072 10.23% 1,805,045 11,911,308 1.63
2022-02-15 17,652,072 20,091,310 -12.14% -2,439,238 14,005,555 1.26
2022-01-31 20,091,310 23,489,441 -14.47% -3,398,131 14,761,616 1.36
2022-01-14 23,489,441 23,155,050 1.44% 334,391 12,887,925 1.82
2021-12-31 23,155,050 21,285,020 8.79% 1,870,030 10,956,897 2.11
2021-12-15 21,285,020 18,726,201 13.66% 2,558,819 15,527,796 1.37
2021-11-30 18,726,201 22,177,006 -15.56% -3,450,805 16,221,862 1.15
2021-11-15 22,177,006 20,835,103 6.44% 1,341,903 13,976,639 1.59
2021-10-29 20,835,103 21,878,917 -4.77% -1,043,814 13,227,241 1.58
2021-10-15 21,878,917 22,562,337 -3.03% -683,420 26,192,202 1.00
2021-09-30 22,562,337 28,180,728 -19.94% -5,618,391 15,959,385 1.41
2021-09-15 28,180,728 27,417,143 2.79% 763,585 10,931,927 2.58
2021-08-31 27,417,143 26,693,706 2.71% 723,437 7,955,739 3.45
2021-08-13 26,693,706 23,173,019 15.19% 3,520,687 8,625,304 3.09
2021-07-30 23,173,019 22,245,886 4.17% 927,133 9,148,087 2.53
2021-07-15 22,245,886 23,932,756 -7.05% -1,686,870 7,804,274 2.85
2021-06-30 23,932,756 22,067,660 8.45% 1,865,096 15,611,958 1.53
2021-06-15 22,067,660 18,828,825 17.20% 3,238,835 13,724,554 1.61
2021-05-28 18,830,269 20,786,258 -9.41% -1,955,989 9,374,889 2.01
2021-05-14 20,786,258 20,471,440 1.54% 314,818 10,316,972 2.01
2021-04-30 20,471,440 21,022,852 -2.62% -551,412 10,840,369 1.89
2021-04-15 21,022,852 23,579,107 -10.84% -2,556,255 8,445,969 2.49
2021-03-31 23,743,732 18,138,252 30.90% 5,605,480 14,355,374 1.65
2021-03-15 18,138,252 20,384,636 -11.02% -2,246,384 11,963,341 1.52
2021-02-26 20,384,636 18,470,508 10.36% 1,914,128 9,147,416 2.23
2021-02-12 18,470,508 18,576,792 -0.57% -106,284 10,648,980 1.73
2021-01-29 18,576,792 18,229,409 1.91% 347,383 9,007,210 2.06
2021-01-15 18,229,409 15,966,088 14.18% 2,263,321 9,262,387 1.97
2020-12-31 15,966,088 13,586,288 17.52% 2,379,800 8,675,890 1.84
2020-12-15 13,586,288 13,500,104 0.64% 86,184 7,477,423 1.82
2020-11-30 13,500,104 13,458,879 0.31% 41,225 7,357,231 1.83
2020-11-13 13,458,879 14,751,083 -8.76% -1,292,204 7,612,587 1.77
2020-10-30 14,751,083 10,529,415 40.09% 4,221,668 7,842,339 1.88
2020-10-15 10,529,415 10,979,550 -4.10% -450,135 7,315,624 1.44
2020-09-30 10,979,550 10,966,180 0.12% 13,370 7,295,027 1.51
2020-09-15 10,966,180 12,107,807 -9.43% -1,141,627 7,760,123 1.41
2020-08-31 12,107,807 11,796,980 2.63% 310,827 6,397,899 1.89
2020-08-14 11,796,980 13,701,258 -13.90% -1,904,278 6,366,843 1.85
2020-07-31 13,701,258 14,642,574 -6.43% -941,316 7,509,511 1.82
2020-07-15 14,642,574 14,880,963 -1.60% -238,389 6,644,782 2.20
2020-06-30 14,880,963 14,562,053 2.19% 318,910 9,973,359 1.49
2020-06-15 14,562,053 15,807,594 -7.88% -1,245,541 9,559,562 1.52
2020-05-29 15,807,594 18,989,713 -16.76% -3,182,119 10,039,773 1.57
2020-05-15 18,989,713 18,957,966 0.17% 31,747 8,855,873 2.14
2020-04-30 18,892,356 20,611,316 -8.34% -1,718,960 11,159,926 1.69
2020-04-15 20,611,316 18,264,033 12.85% 2,347,283 9,994,414 2.06
2020-03-31 18,264,061 18,162,674 0.56% 101,387 16,648,581 1.10
2020-03-13 18,162,674 20,780,382 -12.60% -2,617,708 15,181,201 1.20
2020-02-28 20,780,382 22,555,495 -7.87% -1,775,113 13,341,912 1.56
2020-02-14 22,555,495 25,328,920 -10.95% -2,773,425 13,502,549 1.67
2020-01-31 25,328,920 24,916,308 1.66% 412,612 8,954,918 2.83
2020-01-15 24,916,308 25,151,526 -0.94% -235,218 7,879,137 3.16
2019-12-31 25,151,526 24,379,787 3.17% 771,739 6,978,305 3.60
2019-12-13 24,379,787 24,665,071 -1.16% -285,284 6,576,873 3.71
2019-11-29 24,665,071 21,792,933 13.18% 2,872,138 8,772,042 2.81
2019-11-15 21,792,933 19,858,698 9.74% 1,934,235 7,832,914 2.78
2019-10-31 19,858,698 21,437,894 -7.37% -1,579,196 9,729,483 2.04
2019-10-15 21,437,894 21,468,468 -0.14% -30,574 6,250,232 3.43
2019-09-30 21,468,468 17,982,757 19.38% 3,485,711 8,998,181 2.39
2019-09-13 17,982,757 20,129,794 -10.67% -2,147,037 9,098,875 1.98
2019-08-30 20,129,794 21,825,650 -7.77% -1,695,856 6,811,551 2.96
2019-08-15 21,825,650 18,784,436 16.19% 3,041,214 9,665,820 2.26
2019-07-31 18,784,436 18,941,782 -0.83% -157,346 9,254,952 2.03
2019-07-15 18,941,782 19,342,020 -2.07% -400,238 11,080,751 1.71
2019-06-28 19,342,020 17,313,626 11.72% 2,028,394 13,688,401 1.41
2019-06-14 17,313,626 17,742,783 -2.42% -429,157 8,890,144 1.95
2019-05-31 17,709,346 16,905,739 4.75% 803,607 9,230,223 1.92
2019-05-15 16,905,739 14,324,639 18.02% 2,581,100 9,366,839 1.80
2019-04-30 14,324,639 22,306,347 -35.78% -7,981,708 15,995,919 1.00
2019-04-15 22,306,347 32,630,395 -31.64% -10,324,048 9,064,182 2.46
2019-03-29 32,630,395 38,684,680 -15.65% -6,054,285 9,641,379 3.38
2019-03-15 38,684,680 39,664,695 -2.47% -980,015 9,626,470 4.02
2019-02-28 39,664,695 40,587,926 -2.27% -923,231 8,687,498 4.57
2019-02-15 40,587,926 34,557,279 17.45% 6,030,647 10,925,513 3.71
2019-01-31 34,557,279 42,215,861 -18.14% -7,658,582 14,250,904 2.42
2019-01-15 42,215,861 47,235,361 -10.63% -5,019,500 13,470,984 3.13

Frequently Asked Questions (FAQ)

What is short interest?

Short interest represents the number of shares sold short but not yet covered. It reflects bearish sentiment and short-selling pressure.

What does Short Interest % of Float mean?

This metric indicates what percentage of a company’s tradable float is currently held as short positions. Higher percentages imply stronger short pressure.

What is considered high short interest?

Typically:
• 5%–10%: Moderate
• 10%–20%: High
• 20%+: Extremely high with elevated squeeze risk

What is a short squeeze?

A short squeeze occurs when short sellers rush to cover their positions as the stock price rises, accelerating the upward movement.

What is Days to Cover (DTC)?

Days to Cover equals short interest divided by average daily trading volume. Higher DTC means shorts need more time to exit their positions.

What level of Days to Cover is risky?

• <2 days: Low risk
• 2–5 days: Moderate
• 5+ days: High squeeze potential
• 7–10 days: Extreme risk zone

What causes a short squeeze?

Common triggers include strong earnings, breakouts, upgrades, high volume, low float, or extreme short interest combined with rising prices.

What is a Short Squeeze Score?

It is a composite rating reflecting squeeze risk using short interest, DTC, liquidity, and momentum factors.

Can a stock with low short interest still squeeze?

Yes. Low float or sudden momentum can still trigger squeezes, though the probability is lower than highly shorted stocks.

How often is short interest updated?

FINRA updates short interest twice each month (bi-weekly). Market platforms refresh once the data is released.

Does short interest data get delayed during a U.S. government shutdown?

FINRA is not a government agency, so its operations do not stop during a federal shutdown. However, short interest data can still be delayed indirectly because the reporting and regulatory infrastructure involves broker-dealers and certain SEC processes.

During prolonged shutdowns, minor delays have occurred historically, but FINRA generally continues releasing bi-weekly short interest updates with minimal disruption.

Are short squeezes predictable?

You can identify high-risk conditions, but timing is inherently uncertain. A squeeze requires both high short interest and positive momentum.

Does high short interest guarantee a squeeze?

No. High short interest often reflects negative fundamental expectations and may not result in a squeeze if price pressure does not rise.

Is MRK currently a highly shorted stock?

This depends on the latest Short Interest % of Float shown above. Levels above 10% are considered high, while above 20% are extremely elevated.

What is the current short squeeze risk for MRK?

The Short Squeeze Score at the top of this page provides a real-time assessment of squeeze probability for MRK.

Is MRK a potential short squeeze candidate?

If MRK has high short interest, elevated DTC, or strong upward momentum, the risk of a squeeze increases significantly.

What is the Days to Cover for MRK?

The DTC value for MRK displayed above reflects how long it may take short sellers to exit their positions.

What is the short interest trend for MRK?

The bi-weekly short interest history on this page shows whether bearish positioning in MRK is increasing or decreasing.

Has short interest in MRK increased recently?

The “Change in Short Interest” indicator above reports the most recent change from the previous FINRA update.

What short interest level is considered risky for MRK?

Typically, squeeze risk for MRK becomes elevated when short interest exceeds 10%–20% of float.

How does MRK compare to other heavily shorted stocks?

The Short Squeeze Score allows direct comparison between MRK and other high-SI stocks in the market.

What historical short interest data is available for MRK?

This dashboard includes all available bi-weekly FINRA short interest records for MRK.

Does MRK have low float or liquidity risks?

Low float or poor liquidity magnifies squeeze potential. These attributes indirectly influence MRK’s Short Squeeze Score.

How often is MRK’s short interest updated?

MRK’s short interest is refreshed with each new FINRA bi-weekly update.

What events could trigger a squeeze in MRK?

Potential triggers include positive earnings, analyst upgrades, high-volume breakouts, or unexpected catalysts that push MRK sharply upward.