What it is
New rules for Spanish securities trading venues
It is a royal decree-law. It was introduced on 29 December 2017. Introduced by: Gobierno.
Official title: Royal Decree-Law 21/2017, of December 29, on urgent measures for the adaptation of Spanish law to the regulations of the European Union regarding the securities market.
Source: Congreso de los Diputados, file 130/000027· updated 11 Nov
Automatic summary, not yet reviewed
- Regulated markets need authorization from the CNMV Comisión Nacional del Mercado de Valores, the Spanish public agency that supervises securities markets. to start operating. If the CNMV does not rule within six months, the request is deemed denied.
- Regulated markets must meet organization and operation requirements: managing conflicts of interest, having resilient trading systems, controlling algorithmic trading, setting transparent fees and managing volatility, among others.
- The figure of the organized trading system (SOC) is created, alongside regulated markets and multilateral trading systems. All of them need prior CNMV authorization and at least three active members or users.
- Regulated markets may suspend or exclude from trading instruments that break their rules, and the CNMV may also suspend or exclude them in certain cases, such as the issuer's liquidation.
- A sanction regime is established with very serious and serious offenses. Maximum fines are 5 million euros or 10% of annual turnover for very serious offenses, and 2.5 million euros or 5% for serious ones.
- The rule enters into force on January 3, 2018 to adapt Spanish law to European securities market rules. Existing markets are automatically deemed authorized.
Who it affects
- Spanish regulated markets, such as the stock exchanges: They must obtain or are automatically granted authorization and must meet new organization and operation requirements.
- Managers of multilateral trading systems and organized trading systems: They need CNMV authorization and must follow specific rules.
- Investment services firms: They must meet technical requirements if they do algorithmic trading or provide direct electronic access, and can be sanctioned.
- CNMV: It is the authority that authorizes, supervises and sanctions.
- Issuers of financial instruments: Their instruments may be suspended or excluded from trading.
Words worth knowing
- Mercado regulado (regulated market)
- An official market where financial instruments are bought and sold, such as a stock exchange.
- Sistema multilateral de negociación (multilateral trading system)
- An alternative to the stock exchange where several participants trade financial instruments under their own rules.
- Sistema organizado de contratación (organized trading system)
- A more flexible trading system than the multilateral one, where its operator has more discretion over which orders are matched.
- Negociación algorítmica (algorithmic trading)
- Trading financial instruments through computer programs that generate orders automatically.
- CNMV
- Comisión Nacional del Mercado de Valores, the Spanish public agency that supervises securities markets.
It summarizes the law as published in the BOE. It is written by artificial intelligence and may contain mistakes: the official text is what counts. Read the official text · How we make summaries
Where it stands
How far did it get?
It took 7 of 7 steps. It reached BOE, and today it is passed.
- Introduced29 December 2017Someone registers the text in the Congreso.
- Admitted9 January 2018The Bureau of the Congreso accepts it and, for a members’ bill, the plenary decides whether to consider it.
- Amendmentsno dateGroups propose changes.
- Committeeno dateA committee goes through the text in detail.
- Plenary9 January 2018All 350 deputies vote.
- Senateno dateThe Senate can pass it, amend it or veto it.
- BOEno dateIt is published in the Official State Gazette (BOE) and comes into force.
See the 4 official steps on a timeline
6 February 2018
How did the plenary vote?
Voted on: Processing as a Government bill by the urgent procedure of Royal Decree-Law 21/2017, of December 29, on urgent measures for the adaptation of Spanish law to the European Union regulations on the securities market.
This law had 2 votes; this is the latest with every deputy’s vote. See them all
Source: Congreso de los Diputados, vote 4 of sitting 95· updated 10 Nov
Each dot is a seat. Tap one, or use the arrow keys, to see who it is.
Your province
How did the deputies from your province vote?
And your senators: the Senate does not link its votes to this law in its open data, so we cannot put them side by side here.
Or see how most of each province voted
- A Coruña More votes in favour 8 yes · 0 no
- Albacete More votes in favour 4 yes · 0 no
- Alicante/Alacant More votes in favour 11 yes · 0 no
- Almería More votes in favour 6 yes · 0 no
- Araba/Álava More votes in favour 4 yes · 0 no
- Asturias More votes in favour 8 yes · 0 no
- Ávila More votes in favour 3 yes · 0 no
- Badajoz More votes in favour 6 yes · 0 no
- Barcelona More votes in favour 29 yes · 0 no
- Bizkaia More votes in favour 8 yes · 0 no
- Burgos More votes in favour 4 yes · 0 no
- Cáceres More votes in favour 4 yes · 0 no
- Cádiz More votes in favour 9 yes · 0 no
- Cantabria More votes in favour 5 yes · 0 no
- Castellón/Castelló More votes in favour 5 yes · 0 no
- Ceuta More votes in favour 1 yes · 0 no
- Ciudad Real More votes in favour 4 yes · 0 no
- Córdoba More votes in favour 6 yes · 0 no
- Cuenca More votes in favour 3 yes · 0 no
- Gipuzkoa More votes in favour 5 yes · 0 no
- Girona More votes in favour 5 yes · 0 no
- Granada More votes in favour 7 yes · 0 no
- Guadalajara More votes in favour 3 yes · 0 no
- Huelva More votes in favour 5 yes · 0 no
- Huesca More votes in favour 3 yes · 0 no
- Illes Balears More votes in favour 8 yes · 0 no
- Jaén More votes in favour 5 yes · 0 no
- La Rioja More votes in favour 4 yes · 0 no
- Las Palmas More votes in favour 8 yes · 0 no
- León More votes in favour 4 yes · 0 no
- Lleida More votes in favour 4 yes · 0 no
- Lugo More votes in favour 4 yes · 0 no
- Madrid More votes in favour 33 yes · 0 no
- Málaga More votes in favour 11 yes · 0 no
- Melilla More votes in favour 1 yes · 0 no
- Murcia More votes in favour 10 yes · 0 no
- Navarra More votes in favour 5 yes · 0 no
- Ourense More votes in favour 4 yes · 0 no
- Palencia More votes in favour 3 yes · 0 no
- Pontevedra More votes in favour 7 yes · 0 no
- Salamanca More votes in favour 4 yes · 0 no
- Santa Cruz de Tenerife More votes in favour 7 yes · 0 no
- Segovia More votes in favour 3 yes · 0 no
- Sevilla More votes in favour 11 yes · 0 no
- Soria More votes in favour 2 yes · 0 no
- Tarragona More votes in favour 5 yes · 0 no
- Teruel More votes in favour 3 yes · 0 no
- Toledo More votes in favour 6 yes · 0 no
- Valencia/València More votes in favour 16 yes · 0 no
- Valladolid More votes in favour 5 yes · 0 no
- Zamora More votes in favour 3 yes · 0 no
- Zaragoza More votes in favour 7 yes · 0 no
More details: how each group and each province voted
The groups
Who voted in favour and who against?
In favour, most of Socialista, Vasco (EAJ-PNV), Mixto, Ciudadanos, Gcup-ec-em, GER, Sin grupo and Popular en el Congreso.
By province: in 52 most voted in favour; in 0, against.
Coloured by how most of each province’s deputies voted.
- In favour: 52
- Against: 0
| Group | Seats | How it voted |
|---|---|---|
| Socialista | 84 | 82 in favour · 2 did not vote |
| Vasco (EAJ-PNV) | 5 | 5 in favour |
| Mixto | 19 | 16 in favour · 3 did not vote |
| Ciudadanos | 32 | 32 in favour |
| Gcup-ec-em | 66 | 64 in favour · 2 did not vote |
| GER | 9 | 9 in favour |
| Sin grupo | 1 | 1 in favour |
| Popular en el Congreso | 134 | 130 in favour · 4 did not vote |
What happens next
What happens now?
It is law, or will be once published in the BOE. It comes into force on the date its own text sets.
Published in the BOE: Royal Decree-Law 21/2017, of December 29, on urgent measures for the adaptation of Spanish law to the regulations of the European Union regarding the securities market.
Sources
Where does all this come from?
- Congreso de los Diputados, file 130/000027
Official title, type, author, dates and stage.
Retrieved 11 November 2026
- Congreso de los Diputados, vote 4 of sitting 95
The count and every seat’s vote.
Retrieved 10 November 2026
- BOE, BOE-A-2017-15837
The law as published.
Retrieved 11 November 2026
- The data comes from the open files of the Congreso, the Senate and the BOE, unaltered.
- Each deputy’s province is the one of their seat on the day of the vote.
- We only say “passed” or “rejected” when the majority needed is certain; otherwise we say which side had more votes.