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Stable URLs, refreshed monthly from SEC N-MFP structured data.

One stable CSV, refreshed each month when the SEC posts the new N-MFP structured dataset (funds file within five business days of month-end; DERA publishes the compiled dataset on a lag of roughly a month).

money-market-fund-yields.csv

All 1068 share classes filed for June 2026 month-end. One row per share class. Columns:

ColumnMeaning
tickerTrading symbol from the SEC's EDGAR fund-ticker registry; blank when the class has none
class_id / series_idSEC EDGAR class and series identifiers (C…/S…)
fund_name / class_nameSeries and share-class names as filed
categoryFund's own N-MFP category: Government, Prime, Other Tax Exempt, or Single State
retail_fund_flagY if the fund reports itself as a retail money-market fund under rule 2a-7 (limits ownership to natural persons); institutional-eligible funds report N — note the Y/N flag is about that legal test, not about who can buy a given class
seven_day_net_yield_pctClass's 7-day net yield in percent, latest reported day of the month (almost always the report date); blank if not reported
yield_dateDate that yield was measured
series_seven_day_gross_yield_pctSeries-level 7-day gross (pre-expense) yield, same convention
net_assets_usdClass net assets in dollars at month-end
min_initial_investment_usdMinimum initial investment as filed
registrantRegistrant (fund company trust) name
report_dateMonth-end date the filing covers (2026-06-30 for this file)

Upstream source

SEC DERA, Form N-MFP structured data sets — this month's file: 20260608-20260708_nmfp.zip. Tickers joined from company_tickers_mf.json. Both public domain. Methodology on the about page.