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China National Building Material (CBUMY) Short Interest Ratio & Short Volume

China National Building Material logo
$32.38 0.00 (0.00%)
As of 05/29/2026
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China National Building Material Short Interest Overview

As of May 15, 2026, China National Building Material (CBUMY) had a short interest of 340 shares sold short. This marks a -2.30% decrease in short interest since the prior report. The short interest ratio (days to cover) is 17.0, meaning it would take 17.0 days of the average trading volume of 5,900 shares to cover all short positions.

Current Short Interest
340 shares
Previous Short Interest
348 shares
Change Vs. Previous Month
-2.30%
Dollar Volume Sold Short
$11.01 thousand
Short Interest Ratio
17.0 Days to Cover
Last Record Date
May 15, 2026
Today's Trading Volume
0 shares
Average Trading Volume
5,900 shares
Today's Volume Vs. Average
0%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

CBUMY Short Interest Over Time

CBUMY Days to Cover Over Time

CBUMY Percentage of Float Shorted Over Time

China National Building Material Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
5/15/2026340 shares $11.01 thousand -2.3%N/A17 $32.38
4/30/2026348 shares $11.27 thousand -0.3%N/A13.38 $32.38
4/15/2026349 shares $11.30 thousand -0.6%N/A0.06 $32.38
3/31/2026351 shares $9.53 thousand +125.0%N/A3.05 $27.15
3/13/2026156 shares $5.44 thousand No ChangeN/A156 $34.84
2/27/2026156 shares $5.44 thousand -6.0%N/A31.2 $34.84
2/13/2026166 shares $5.78 thousand -12.6%N/A1.1 $34.84
1/30/2026190 shares $5.70 thousand -0.5%N/A21.11 $30.01
1/15/2026191 shares $5.73 thousand -1.6%N/A95.5 $30.01
12/31/2025194 shares $5.82 thousand -42.6%N/A194 $30.01
12/15/2025338 shares $10.14 thousand -7.7%N/A11.27 $30.01
11/28/2025366 shares $10.98 thousand +155.9%N/A1.53 $30.01
11/14/2025143 shares $4.57 thousand No ChangeN/A143 $31.93
10/31/2025143 shares $4.57 thousand No ChangeN/A2.86 $31.93
10/15/2025100 shares $3.19 thousand No ChangeN/A1 $31.93
9/30/2025100 shares $3.04 thousand No ChangeN/A1.4 $30.41
9/15/2025100 shares $3.04 thousand No ChangeN/A1 $30.41
8/31/2025100 shares $3.48 thousand No ChangeN/A1 $34.82
8/15/2025100 shares $2.77 thousand No ChangeN/A0.5 $27.70
7/31/2025100 shares $3.18 thousand No ChangeN/A1 $31.80
7/15/2025100 shares $2.92 thousand No ChangeN/A0.2 $29.18
6/30/2025100 shares $2.45 thousand -66.7%N/A0.3 $24.52
6/15/2025300 shares $6.71 thousand No ChangeN/A0.8 $22.38
5/31/2025300 shares $6.60 thousand -40.0%N/A1 $22.00
5/15/2025500 shares $10.89 thousand -44.4%N/A1.7 $21.78
4/30/2025900 shares $22.90 thousand -25.0%N/A4.5 $25.45
4/15/20251,200 shares $31.16 thousand +1,100.0%N/A2.4 $25.97
3/31/2025100 shares $2.60 thousand -50.0%N/A0 $25.98
3/15/2025200 shares $5.16 thousand -94.7%N/A0.2 $25.80
2/28/20253,800 shares $96.59 thousand -7.3%N/A7.6 $25.42
2/15/20254,100 shares $102.13 thousand -18.0%N/A6.8 $24.91
1/31/20255,000 shares $119.75 thousand -12.3%N/A4.2 $23.95
1/15/20255,700 shares $122.21 thousand +5.6%N/A2.7 $21.44
12/31/20245,400 shares $122.31 thousand -23.9%N/A3.4 $22.65
12/15/20247,100 shares $163.80 thousand +51.1%N/A0.7 $23.07
11/30/20244,700 shares $99.69 thousand +176.5%N/A3.1 $21.21
11/15/20241,700 shares $34.31 thousand +88.9%N/A0.9 $20.18
10/31/2024900 shares $19.22 thousand -80.0%N/A0.1 $21.36
10/15/20244,500 shares $82.94 thousand +246.2%N/A1.1 $18.43
9/30/20241,300 shares $23.00 thousand +116.7%N/A0.9 $17.69
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9/15/2024600 shares $7.89 thousand -25.0%N/A2 $13.15
8/31/2024800 shares $11.64 thousand -11.1%N/A8 $14.55
8/15/2024900 shares $14.63 thousand +80.0%N/A3 $16.26
7/31/2024500 shares $8.20 thousand -16.7%N/A5 $16.40
7/15/2024600 shares $11.50 thousand -25.0%N/A0.8 $19.17
6/30/2024800 shares $14.34 thousand +300.0%N/A2.7 $17.93
6/15/2024200 shares $3.79 thousand -33.3%N/A0.4 $18.97
5/31/2024300 shares $6.86 thousand -62.5%N/A1 $22.86
5/15/2024800 shares $16.63 thousand No ChangeN/A0.9 $20.79
4/15/2024800 shares $15.47 thousand +700.0%N/A1.6 $19.34
3/31/2024100 shares $1.75 thousand No ChangeN/A0 $17.47
3/15/2024100 shares $1.92 thousand No ChangeN/A1 $19.18
2/29/2024100 shares $1.98 thousand No ChangeN/A1 $19.83
2/15/2024100 shares $1.82 thousand No ChangeN/A1 $18.15
1/15/2024100 shares $1.84 thousand No ChangeN/A0.1 $18.43
12/31/2023100 shares $2.12 thousand No ChangeN/A0.2 $21.15
12/15/2023100 shares $2.12 thousand No ChangeN/A1 $21.20
11/30/2023100 shares $2.45 thousand No ChangeN/A1 $24.52
11/15/2023100 shares $2.45 thousand No ChangeN/A1 $24.52
10/31/2023100 shares $2.45 thousand -83.3%N/A0 $24.52
10/15/2023600 shares $15.01 thousand +500.0%N/A2 $25.02
9/30/2023100 shares $2.59 thousand -66.7%N/A1 $25.90
9/15/2023300 shares $7.95 thousand +50.0%N/A3 $26.49
8/31/2023200 shares $5.30 thousand +100.0%N/A1.7 $26.49
8/15/2023100 shares $2.71 thousand No ChangeN/A1 $27.08
7/15/20231,000 shares $28.60 thousand +66.7%N/A1.4 $28.60
6/30/2023600 shares $18.53 thousand No ChangeN/A6 $30.88
6/15/2023600 shares $18.52 thousand -40.0%N/A1.5 $30.86
5/31/20231,000 shares $28.18 thousand No ChangeN/A2 $28.18
5/15/20231,000 shares $37.62 thousand +42.9%N/A3.3 $37.62
4/30/2023700 shares $26.57 thousand +40.0%N/A7 $37.95
4/15/2023500 shares $19.95 thousand No ChangeN/A0.7 $39.89
3/31/2023500 shares $21.56 thousand -16.7%N/A5 $43.11
3/15/2023600 shares $27.66 thousand +500.0%N/A1.5 $46.10
2/28/2023100 shares $4.55 thousand No ChangeN/A1 $45.49
2/15/2023100 shares $4.55 thousand No ChangeN/A1 $45.49
1/31/2023100 shares $4.47 thousand -83.3%N/A0.5 $44.68
1/15/2023600 shares $26.81 thousand +200.0%N/A3 $44.68
12/30/2022200 shares $8.81 thousand No ChangeN/A2 $44.06
12/15/2022200 shares $8.81 thousand No ChangeN/A1 $44.06
11/30/2022200 shares $8.21 thousand +100.0%N/A2 $41.03
11/15/2022100 shares $3.76 thousand No ChangeN/A1 $37.62
10/31/2022100 shares $3.66 thousand No ChangeN/A1 $36.62
10/15/2022100 shares $3.82 thousand No ChangeN/A1 $38.20
9/30/2022100 shares $3.82 thousand No ChangeN/A0.3 $38.20
5/31/2022100 shares $6.17 thousand No ChangeN/A1 $61.73
4/30/2022100 shares $6.72 thousand No ChangeN/A1 $67.20
4/15/2022100 shares $6.62 thousand No ChangeN/A0.5 $66.18
2/28/2022100 shares $6.38 thousand No ChangeN/A0 $63.75
2/15/2022100 shares $7.24 thousand No ChangeN/A1 $72.40
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1/31/2022100 shares $6.62 thousand -97.1%N/A1 $66.15
1/15/20223,400 shares $224.91 thousand +1,033.3%N/A0.4 $66.15
12/31/2021300 shares $18.11 thousand -25.0%N/A1 $60.36
12/15/2021400 shares $24.44 thousand No ChangeN/A0.6 $61.11
10/29/2021100 shares $6.23 thousand No ChangeN/A0 $62.25
10/15/2021100 shares $6.55 thousand No ChangeN/A0.1 $65.49
9/30/2021100 shares $6.74 thousand -75.0%N/A0 $67.37
9/15/2021400 shares $31.21 thousand -42.9%N/A0.1 $78.03
8/31/2021700 shares $46.90 thousand -46.2%N/A0.4 $67.00
8/13/20211,300 shares $83.84 thousand +85.7%N/A0.8 $64.50
7/30/2021700 shares $38.60 thousand +75.0%N/A0.2 $55.14
7/15/2021400 shares $22.97 thousand -98.5%N/A0.1 $57.42
6/30/202126,600 shares $1.57 million +6,550.0%N/A1.9 $59.00
6/15/2021400 shares $25.26 thousand -55.6%N/A0.3 $63.14

CBUMY Short Interest - Frequently Asked Questions

Short interest is the volume of China National Building Material shares that have been sold short but have not yet been closed out or covered. As of May 15th, traders have sold 340 shares of CBUMY short. Learn More on China National Building Material's current short interest.

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. CBUMY shares currently have a short interest ratio of 17.0. Learn More on China National Building Material's short interest ratio.

China National Building Material saw a decrease in short interest in May. As of May 15th, there was short interest totaling 340 shares, a decrease of 2.3% from the previous total of 348 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

Here is how the short interest of companies in the sector of "basic materials" compare to China National Building Material: Heidelberg Materials (0.00%), Amrize Ltd (1.47%), Alderon Iron Ore Corp. (0.04%).

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($80.71 billion), Invesco QQQ ($47.96 billion), iShares Russell 2000 ETF ($22.13 billion), Western Digital Corporation ($14.35 billion), Sandisk Corporation ($12.86 billion), Salesforce Inc. ($10.89 billion), Nebius Group N.V. ($9.92 billion), SPDR S&P Biotech ETF ($9.72 billion), Lumentum Holdings Inc. ($8.89 billion), and iShares 20+ Year Treasury Bond ETF ($8.18 billion). View all of the most shorted stocks.

Short selling CBUMY is an investing strategy that aims to generate trading profit from China National Building Material as its price is falling. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

A short squeeze for China National Building Material occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of CBUMY, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including CBUMY, twice per month. The most recent reporting period available is May, 15 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like CBUMY:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


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This page (OTCMKTS:CBUMY) was last updated on 5/31/2026 by MarketBeat.com Staff.
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