Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
PFF vs XBI: how they differ
PFF and XBI hold 0% of their weight in the same names, and XBI returned more over the year.
iShares Preferred and Income Securities ETF and State Street(R) SPDR(R) S&P(R) Biotech ETF.
What they hold in common
By the books each fund has filed, PFF and XBI hold 0% of their money in the same securities at the same weight.
| Only in PFF | Only in XBI |
|---|---|
| BOEING COMPANY (THE) 3.99% | Apogee Therapeutics Inc 1.49% |
| STRATEGY INC 2.99% | Moderna Inc 1.41% |
| WELLS FARGO & COMPANY 2.37% | Twist Bioscience Corp 1.41% |
| ORACLE CORP 2.31% | Oruka Therapeutics Inc 1.38% |
| HEWLETT PACKARD ENTERPRISE COMPANY 1.79% | Kymera Therapeutics Inc 1.36% |
| BANK OF AMERICA CORP 1.47% | Viking Therapeutics Inc 1.31% |
| CITIGROUP CAPITAL XIII 1.33% | Praxis Precision Medicines Inc 1.29% |
| ALBEMARLE CORP 1.31% | Erasca Inc 1.27% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026.
| PFF iShares Preferred and Income Securities ETF | XBI State Street(R) SPDR(R) S&P(R) Biotech ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | State Street |
| What it is | Preferred and Income Securities | SPDR S&P Biotech |
| Total return, 1 year | −0.8% | +64.0% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −18.3 pts | +46.5 pts |
| Expense ratio | 0.45% | 0.35% |
| Already in the S&P 500 | 21.6% | 8.5% |
| Holdings | 455 | 150 |
PFF in plain words
PFF is an index equity fund tracking the Preferred and Income Securities. Over the year to Sep 11, 2026 it returned −0.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.45% a year. By its holdings filed for Jun 30, 2026, 22% of the fund by weight is stocks the S&P 500 also holds, across 455 positions, with the top ten at 19.9%. It sat 3.2% below its high of May 8, 2026 on Sep 11, 2026.
XBI in plain words
XBI is an index equity fund tracking the SPDR S&P Biotech. Over the year to Sep 11, 2026 it returned +64.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.35% a year. By its holdings filed for Jun 30, 2026, 8% of the fund by weight is stocks the S&P 500 also holds, across 150 positions, with the top ten at 13.3%. It sat 9.6% below its high of Feb 8, 2021 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, PFF or XBI?
- In the year to Sep 12, 2026, with distributions reinvested, PFF returned −0.8% and XBI returned +64.0%, so XBI returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, PFF or XBI?
- PFF charges 0.45% a year and XBI charges 0.35%, so XBI is cheaper. Fees come from each fund's prospectus.
- How much do PFF and XBI overlap with the S&P 500?
- By their latest filed holdings, 22% of PFF and 8% of XBI by weight is stocks the S&P 500 already holds. Between the two funds, 0% of their books are the same securities at the same weight.
Other comparisons
Where to next
Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, PFF against XBI, data as of Sep 12, 2026. https://etfiq.com/compare/any/PFF-XBI Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources