{"url":"https://etfiq.com/compare/themes/fspc-vs-mars","section":"compare","title":"FSPC vs MARS: which is really different? | ETFIQ","description":"27.1% of FSPC and 0.0% of MARS is already in the S&P 500 by weight, as filed, and 30% of the two books are the same names at the same weight.","as_of":"Sep 30, 2026","structured_data":[{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Do FSPC and MARS hold the same stocks?","acceptedAnswer":{"@type":"Answer","text":"By their latest filings, 30% of their books are the same securities at the same weight, which is a meaningful overlap. Overlap is the sum of the smaller weight of every security they share."}},{"@type":"Question","name":"Which is more different from the S&P 500, FSPC or MARS?","acceptedAnswer":{"@type":"Answer","text":"FSPC has 27% of its weight in S&P 500 names and MARS has 0%, so MARS differs more from the index."}},{"@type":"Question","name":"Which is cheaper, FSPC or MARS?","acceptedAnswer":{"@type":"Answer","text":"FSPC charges 0.65% a year and MARS charges 0.75%, so FSPC is cheaper. Fees come from each fund's prospectus."}}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"Thematic ETFs","item":"https://etfiq.com/themes/"},{"@type":"ListItem","position":3,"name":"FSPC vs MARS","item":"https://etfiq.com/compare/themes/fspc-vs-mars"}]},{"@type":"WebPage","name":"FSPC vs MARS: which is really different?","description":"27.1% of FSPC and 0.0% of MARS is already in the S&P 500 by weight, as filed, and 30% of the two books are the same names at the same weight. Returns and overlap to Sep 30, 2026.","url":"https://etfiq.com/compare/themes/fspc-vs-mars","dateModified":"2026-09-30","abstract":"FSPC and MARS hold 30% of their weight in the same names.","publisher":{"@id":"https://etfiq.com/#org"},"isPartOf":{"@id":"https://etfiq.com/#website"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".verdict",".faq"]}},{"@type":"Dataset","name":"ETFIQ comparison of FSPC and MARS","description":"27.1% of FSPC and 0.0% of MARS is already in the S&P 500 by weight, as filed, and 30% of the two books are the same names at the same weight. Returns and overlap to Sep 30, 2026.","dateModified":"2026-09-30","creator":{"@id":"https://etfiq.com/#org"},"isAccessibleForFree":true,"url":"https://etfiq.com/compare/themes/fspc-vs-mars","license":"https://etfiq.com/standards/","publisher":{"@id":"https://etfiq.com/#org"},"inLanguage":"en","creativeWorkStatus":"Published","distribution":[{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/thematic.json"}],"variableMeasured":["Weight overlap with the S&P 500","Active share","Holdings","Top ten share of the fund","Total return","Fee for the differing part","Expense ratio"],"keywords":["exchange-traded funds","ETF","Thematic ETFs","fund data","SEC filings"]}],"characters":7034,"truncated":true,"content":"ETFIQ / Thematic ETFs / Head to head / FSPC vs MARS \n ETFIQ etfiq.com \u00b7 independent ETF data \n\n Data as of Sep 30, 2026 .\n\n FSPC vs MARS: which is really different?\n\n FSPC and MARS hold 30% of their weight in the same names.\n Copy this for sharing \n \n First Trust Bloomberg Space Economy ETF and Roundhill Space & Technology ETF.\n\n Download as PDF \n\n 27.1% FSPC in the S&P 500 \n 0.0% MARS in the S&P 500 \n \u22126.3% FSPC total return, since launch \n +1.4% MARS total return, since launch \n\n ETFIQ Off-Index Score: MARS scores higher\n How much of it is not the index it is sold as an alternative to?\n [FSP","source":"ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.","publisher":{"@id":"https://etfiq.com/#org","name":"ETFIQ","url":"https://etfiq.com"},"license":"https://etfiq.com/license/","citation":"ETFIQ, as of Sep 30, 2026. https://etfiq.com/compare/themes/fspc-vs-mars","a":{"ticker":"FSPC","name":"First Trust Bloomberg Space Economy ETF","issuer":"First Trust","desk":"themes","as_of":"2026-09-30","verdict":"FSPC holds 53 stocks, and 73% of its weight is outside the S&P 500.","url":"https://etfiq.com/funds/fspc","key_facts":[{"label":"Already in the S&P 500","value":"27.1%","as_of":"2026-09-30","source":null},{"label":"Active share vs the S&P 500","value":"98.8%","as_of":"2026-09-30","source":null},{"label":"Top ten holdings","value":"45.5%","as_of":"2026-09-30","source":null},{"label":"Total return, since launch","value":"\u22126.3%","as_of":"2026-09-30","source":null},{"label":"Net assets","value":"$2m","as_of":"2026-09-30","source":"issuer page, as of Sep 30, 2026"},{"label":"Expense ratio","value":"0.65%","as_of":"2026-09-30","source":"485BPOS XBRL, Jul 2, 2026"}]},"b":{"ticker":"MARS","name":"Roundhill Space & Technology ETF","issuer":"Roundhill","desk":"themes","as_of":"2026-09-30","verdict":"MARS holds 29 stocks, and 100% of its weight is outside the S&P 500.","url":"https://etfiq.com/funds/mars","key_facts":[{"label":"Already in the S&P 500","value":"0.0%","as_of":"2026-09-30","source":null},{"label":"Active share vs the S&P 500","value":"100.0%","as_of":"2026-09-30","source":null},{"label":"Top ten holdings","value":"67.9%","as_of":"2026-09-30","source":null},{"label":"Total return, since launch","value":"+1.4%","as_of":"2026-09-30","source":null},{"label":"Net assets","value":"$46m","as_of":"2026-09-30","source":"the issuer\u2019s own daily fund list, as of Sep 30, 2026"},{"label":"Expense ratio","value":"0.75%","as_of":"2026-09-30","source":"485BPOS XBRL, Jan 8, 2026"}]},"overlap_pct":30,"full_text_at":"https://etfiq.com/compare/themes/fspc-vs-mars"}