{"url":"https://etfiq.com/funds/mmid/trading/","section":"funds","title":"MMID Bid-Ask Spread, Liquidity and NAV Premium | ETFIQ","description":"MMID trading costs and liquidity: spread, premium to NAV, capacity and dealers, from ETFIQ. Spread, premium to NAV, capacity and dealers, dated.","as_of":"Oct 22, 2026","structured_data":[{"@type":"Dataset","@id":"https://etfiq.com/funds/mmid/trading/#data","name":"MMID trading costs and liquidity","description":"MMID trading costs and liquidity: spread, premium to NAV, capacity and dealers, from ETFIQ. Spread, premium to NAV, capacity and dealers, dated.","url":"https://etfiq.com/funds/mmid/trading/","dateModified":"2026-10-22","creator":{"@id":"https://etfiq.com/#org"},"license":"https://etfiq.com/license/","isAccessibleForFree":true,"creditText":"ETFIQ (etfiq.com)","variableMeasured":["30-day median bid-ask spread","Premium or discount to NAV","Capacity","Active authorized participants","IQ Liquidity Score","Cost to trade by order size"],"distribution":[{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/trading-score.json"}],"publisher":{"@id":"https://etfiq.com/#org"},"inLanguage":"en","creativeWorkStatus":"Published"},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Who is the AP for MMID?","acceptedAnswer":{"@type":"Answer","text":"MMID\u2019s latest Form N-CEN, for the period ending Feb 28, 2026, lists 13 authorized participants (APs), and 3 created or redeemed shares. The largest were Virtu Americas LLC (81.1%), Jane Street Capital, LLC (16.1%), J.P. Morgan Securities LLC (2.8%) of the dollars its APs created and redeemed."}},{"@type":"Question","name":"Who is the LMM for MMID?","acceptedAnswer":{"@type":"Answer","text":"MMID is on none of the lead market maker (LMM) lists ETFIQ reads, from NYSE Arca, Cboe BZX and Nasdaq. Each list covers only that exchange\u2019s own program, so this does not mean it has no LMM."}}]},{"@type":"InvestmentFund","@id":"https://etfiq.com/funds/mmid#fund","name":"MFS Active Mid Cap ETF","alternateName":"MMID","url":"https://etfiq.com/funds/mmid","identifier":[{"@type":"PropertyValue","propertyID":"tickerSymbol","value":"MMID"}],"mainEntityOfPage":{"@id":"https://etfiq.com/funds/mmid#webpage"}},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"MMID","item":"https://etfiq.com/funds/mmid"},{"@type":"ListItem","position":3,"name":"Trading","item":"https://etfiq.com/funds/mmid/trading/"}]},{"@type":"WebPage","name":"MMID Bid-Ask Spread, Liquidity and NAV Premium","description":"MMID trading costs and liquidity: spread, premium to NAV, capacity and dealers, from ETFIQ. Spread, premium to NAV, capacity and dealers, dated.","url":"https://etfiq.com/funds/mmid/trading/","dateModified":"2026-10-22","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".faq"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":3711,"truncated":false,"content":"ETFIQ / MMID / Trading \n \n As of Oct 22, 2026. Rebuilt every trading night.\n MMID bid-ask spread and liquidity\n IQ Liquidity Score\n Not scored, 2 of 6 measured.\n A fixed 0 to 100 scale of trading conditions, the same anchors for every fund; 100 is the easiest to trade. It measures how cheaply and reliably the fund can be bought and sold, not whether to own it. How the score is built \n Flags: One dealer.\n Cost to trade Not measured: the issuer's 30-day median spread is not read for this fund Capacity, 48.7 Holdings can absorb $29m a day, Oct 22, 2026 Price fidelity Not measured: no closing premium is held for this fund Primary market, 50.0 3 active dealers of 13; largest 81% of creations and redemptions, N-CEN to Feb 28, 2026 Bad-day behaviour Not measured: no daily closing premium is held for this fund Depth Not measured: needs trade and quote data (Phase 2) \n Capacity\n Its holdings can absorb $29m a day, measured on its own holdings, as of Oct 22, 2026. The holding that sets the limit is Phoenix Education Partners Inc (PXED), 0.76% of the fund.\n Dealers\n 3 active of 13 authorized participants; the largest did 81% of creations and redemptions, in the year to Feb 28, 2026 (Form N-CEN filed May 14, 2026).\n The active authorized participants, largest first, by share of the dollars created and redeemed: Virtu Americas LLC (81.1%), Jane Street Capital, LLC (16.1%), J.P. Morgan Securities LLC (2.8%). 10 more were listed and created or redeemed nothing.\n How to trade MMID\n When ETF spreads are usually widest in the first minutes after the open and the last minutes before the close. ETFIQ measures this fund\u2019s own day once it has trade data. Size Up to $289,023 is 1% of what its holdings can absorb in a day, for a buy or a sell. Coming with trade data\n Spread through the day, buyers against sellers, an estimate of retail flow, large trades and the closing auction\u2019s share, each once ETFIQ has trade and quote data.\n Questions people ask\n Who is the AP for MMID? MMID\u2019s latest Form N-CEN, for the period ending Feb 28, 2026, lists 13 authorized participants (APs), and 3 created or redeemed shares. The largest were Virtu Americas LLC (81.1%), Jane Street Capital, LLC (16.1%), J.P. Morgan Securities LLC (2.8%) of the dollars its APs created and redeemed. Who is the LMM for MMID? MMID is on none of the lead market maker (LMM) lists ETFIQ reads, from NYSE Arca, Cboe BZX and Nasdaq. Each list covers only that exchange\u2019s own program, so this does not mean it has no LMM. Sources and dates\n Capacity: ETFIQ, from each holding\u2019s 20-day median dollar volume, to Oct 22, 2026.\n Dealers: Form N-CEN, the year to Feb 28, 2026, accession 0001410368-26-044797.\n Where to next\n MMID fund page ETF trading costs and liquidity Limit orders vs market orders for ETFs Why low volume does not mean illiquid How the IQ Liquidity Score is built Compare MMID with another fund The score measures trading conditions, not the fund. ETFIQ is an independent publisher, not an adviser, and makes no recommendations. Standards and sources \n Cite this page. ETFIQ, MMID trading: cost, capacity, premium and dealers, data as of Oct 22, 2026. https://etfiq.com/funds/mmid/trading/ Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at Open data .\n Other forms Plain ETFIQ, MMID trading: cost, capacity, premium and dealers, data as of Oct 22, 2026. https://etfiq.com/funds/mmid/trading/ APA ETFIQ. (Oct 22, 2026). MMID trading: cost, capacity, premium and dealers. Retrieved from https://etfiq.com/funds/mmid/trading/ Markdown [MMID trading: cost, capacity, premium and dealers (ETFIQ, Oct 22, 2026)](https://etfiq.com/funds/mmid/trading/)","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/","license_text":"Figures ETFIQ computes are free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.","citation":"ETFIQ, MMID trading: cost, capacity, premium and dealers, data as of Oct 22, 2026. https://etfiq.com/funds/mmid/trading/"}