RCONB559: Mortgage-backed Securities
RCONB559 is the call report code for mortgage-backed securities, reported on Schedule RC-K, Quarterly Averages. For Q2 2026, 4,217 banks reported it, totaling $663.43B; the median among the 3,591 with a nonzero amount was $29.3M. The largest value reported for Q2 2026 was $19.31B, by Ameriprise Bank, FSB.
Definition
Report the quarterly average of the amortized cost of the bank's held-to-maturity and available-for-sale mortgage-backed securities (as defined for Schedule RC-B, item 4, columns A and C).
Source: Federal Reserve Micro Data Reference Manual (MDRM). The FFIEC call report instructions remain the authority on how to report the item.
Where RCONB559 sits on the call report
| Code | RCONB559 (prefix RCON, item B559) |
|---|---|
| Prefix RCON | Domestic offices. Banks without foreign offices (FFIEC 041 and 051 filers) report their whole balance sheet in RCON items. |
| Schedule | RC-K, Quarterly Averages |
| Reported on | FFIEC 041, FFIEC 051 |
| Value | Dollar amount, reported in thousands, as of the quarter end |
| In the MDRM since | 2001 |
The same item under other prefixes
Item B559 is also reported under these codes. Which banks file each one depends on the form they file.
| Code | Meaning of the prefix | Banks reporting |
|---|---|---|
| RCFDB559 | The consolidated bank, domestic and foreign offices, reported by FFIEC 031 filers (banks with foreign offices) | 80 |
Largest reported values, Q2 2026
| Bank | Headquarters | RCONB559 |
|---|---|---|
| Ameriprise Bank, FSB | Minneapolis, MN | $19.31B |
| Webster Bank, N.A. | Stamford, CT | $17.36B |
| BOKF, N.A. | Tulsa, OK | $14.77B |
| Zions Bancorporation, N.A. | Salt Lake City, UT | $14.74B |
| Prosperity Bank | El Campo, TX | $12.04B |
| Frost Bank | San Antonio, TX | $10.61B |
| Western Alliance Bank | Phoenix, AZ | $10.03B |
| Associated Bank, N.A. | Green Bay, WI | $8.29B |
| BankUnited, N.A. | Miami Lakes, FL | $8.20B |
| Columbia Bank | Lake Oswego, OR | $7.67B |
Total reported by quarter
| Quarter end | Banks reporting | Total reported |
|---|---|---|
| June 30, 2026 | 4,217 | $663.43B |
| March 31, 2026 | 4,256 | $654.83B |
| December 31, 2025 | 4,314 | $668.73B |
| September 30, 2025 | 4,355 | $660.89B |
| June 30, 2025 | 4,397 | $659.06B |
| March 31, 2025 | 4,437 | $654.95B |
| December 31, 2024 | 4,461 | $649.53B |
| September 30, 2024 | 4,490 | $644.17B |
Related
All codes on Schedule RC-K · All call report schedules · Find the code for a loan type · What a call report is