Data as of .
BAI vs TCAI: which is really different?
BAI and TCAI hold 16% of their weight in the same names, and TCAI returned more over the year.
ETFIQ Off-Index Score: TCAI scores higher
How much of it is not the index it is sold as an alternative to?
A percentile among the 379 thematic ETFs with a holdings filing. It is a position in a set, not a rating, and neither end of it is a recommendation. All thematic ETFs ranked by it · How it is computed
16% of the two portfolios are the same securities at the same weight.
What they hold in common
By the books each fund has filed, BAI and TCAI hold 16% of their money in the same securities at the same weight.
| Holding | BAI | TCAI |
|---|---|---|
| MICRON TECHNOLOGY | 6.62% | 7.64% |
| SANDISK | 2.59% | 3.47% |
| WESTERN DIGITAL CORP | 2.52% | 5.14% |
| ARISTA NETWORKS | 2.23% | 1.71% |
| CREDO TECHNOLOGY GROUP HOLDING LTD | 1.58% | 3.03% |
| LUMENTUM HOLDINGS | 2.84% | 0.86% |
| NVIDIA | 5.31% | 0.59% |
| CELESTICA | 0.84% | 0.43% |
| Only in BAI | Only in TCAI |
|---|---|
| ADVANCED MICRO DEVICES 5.20% | Dell Technologies Inc 8.94% |
| TAIWAN SEMICONDUCTOR MANUFACTURING 4.68% | Seagate Technology Holdings PL 5.77% |
| BROADCOM INC 4.61% | Ciena Corp 5.10% |
| LAM RESEARCH 3.85% | Vertiv Holdings Co 4.48% |
| SPACE EXPLORATION TECHNOLOGIES COR 3.05% | Quanta Services Inc 3.58% |
| INTEL CORPORATION 3.01% | MYR Group Inc 3.29% |
| SNOWFLAKE 2.97% | nVent Electric PLC 3.18% |
| MARVELL TECHNOLOGY 2.48% | IREN Ltd 2.78% |
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 May 31, 2026 and Sep 18, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| BAI | TCAI | BAI | TCAI | BAI | TCAI | |
| 3 months | −15.2% | −16.4% | −17.4 pts | −18.6 pts | −12.7 pts | −13.9 pts |
| 6 months | +34.8% | +34.7% | +16.8 pts | +16.7 pts | +10.6 pts | +10.5 pts |
| 1 year | +32.2% | +67.6% | +15.7 pts | +51.0 pts | +10.4 pts | +45.8 pts |
| Since launch | +83.4% | +88.8% | +49.9 pts | +65.8 pts | +36.7 pts | +59.4 pts |
| BAI iShares A.I. Innovation and Tech Active ETF Holds 55 stocks in artificial intelligence, 56% of its weight in S&P 500 companies | TCAI Tortoise AI Infrastructure ETF Holds 43 stocks in aI infrastructure and chips, 63% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | iShares | Tortoise |
| Theme | Artificial intelligence | AI infrastructure and chips |
| In the S&P 500 | 55.6% | 63.2% |
| Active share vs the S&P 500 | 76.4% | 92.7% |
| In the Nasdaq-100 | 50.0% | 26.2% |
| Holdings | 55 | 43 |
| Top ten, share of the fund | 42.2% | 50.6% |
| Expense ratio | 0.55% | 0.65% |
| Fee for the differing part | 0.72% | 0.70% |
| Total return, 1 year | +32.2% | +67.6% |
| vs the S&P 500 | +15.7 pts | +51.0 pts |
| vs the Nasdaq-100 | +10.4 pts | +45.8 pts |
| Below its high | −16.8% | −18.4% |
| Net assets | $14.4bn | $217m |
BAI in plain words
By weight, 56% of BAI's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 76%. The top ten holdings are 42% of the fund across 55 positions, as published by its issuer for Sep 18, 2026. Over the year to Sep 18, 2026 the fund returned +32.2% with distributions reinvested against +16.6% for the S&P 500, so a holder was ahead by 15.7 pts. It sits 16.8% below its all-time high of Jun 22, 2026.
TCAI in plain words
By weight, 63% of TCAI's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 93%. The top ten holdings are 51% of the fund across 43 positions, as filed for May 31, 2026. Over the year to Sep 18, 2026 the fund returned +67.6% with distributions reinvested against +16.6% for the S&P 500, so a holder was ahead by 51.0 pts. It sits 18.4% below its all-time high of Jun 22, 2026.
Questions people ask
- Do BAI and TCAI hold the same stocks?
- By their latest filings, 16% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.
- Which is more different from the S&P 500, BAI or TCAI?
- BAI has 56% of its weight in S&P 500 names and TCAI has 63%, so TCAI differs more from the index.
- Which is cheaper, BAI or TCAI?
- BAI charges 0.55% a year and TCAI charges 0.65%, so BAI is cheaper. Fees come from each fund's prospectus.
Other comparisons
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, BAI against TCAI, data as of Sep 18, 2026. https://etfiq.com/compare/themes/bai-vs-tcai Free to use with attribution; the underlying files are at Open data.