SPDR Portfolio Mortgage Backed Bond ETF (NYSEARCA:SPMB) Short Interest Up 261.2% in July

Posted by Scott Moore on Aug 15th, 2026

SPDR Portfolio Mortgage Backed Bond ETF (NYSEARCA:SPMB – Get Free Report) was the recipient of a large growth in short interest in July. As of July 31st, there was short interest totaling 895,869 shares, a growth of 261.2% from the July 15th total of 248,013 shares. Based on an average trading volume of 903,169 shares, the days-to-cover ratio is currently 1.0 days. Currently, 0.3% of the shares of the stock are short sold.

Institutional Inflows and Outflows

Several institutional investors have recently modified their holdings of SPMB. Compass Financial Management LLC purchased a new stake in SPDR Portfolio Mortgage Backed Bond ETF in the 2nd quarter valued at approximately $43,000. Centurion Wealth Management LLC acquired a new position in shares of SPDR Portfolio Mortgage Backed Bond ETF in the second quarter worth $209,000. Ehrlich Financial Group raised its holdings in shares of SPDR Portfolio Mortgage Backed Bond ETF by 5.9% in the second quarter. Ehrlich Financial Group now owns 139,202 shares of the company’s stock worth $3,106,000 after acquiring an additional 7,712 shares during the last quarter. Archer Investment Management LLC lifted its position in shares of SPDR Portfolio Mortgage Backed Bond ETF by 83.3% in the second quarter. Archer Investment Management LLC now owns 159,834 shares of the company’s stock valued at $3,566,000 after acquiring an additional 72,641 shares in the last quarter. Finally, GK Wealth Management LLC acquired a new stake in shares of SPDR Portfolio Mortgage Backed Bond ETF during the second quarter valued at $316,000.

SPDR Portfolio Mortgage Backed Bond ETF Stock Performance

Shares of SPMB opened at $22.00 on Friday. The company has a 50-day moving average of $22.13 and a two-hundred day moving average of $22.32. SPDR Portfolio Mortgage Backed Bond ETF has a 12-month low of $21.88 and a 12-month high of $22.87.

SPDR Portfolio Mortgage Backed Bond ETF Company Profile

(Get Free Report)

The SPDR Portfolio Mortgage Backed Bond ETF (SPMB) is an exchange-traded fund that is based on the Bloomberg U.S. MBS index. The fund tracks an index of US agency mortgage pass-through debt. SPMB was launched on Jan 15, 2009 and is managed by State Street.