Regulated markets: institutional requirements and stock market governance
Pages 12-14
Institutional foundations of the regulated market
A regulated market is an organised, authorized, and supervised trading infrastructure,
in which rules of admission, transparency, conduct and control are defined ex ante to guarantee
efficient price formation, investor protection and stability of the financial system.
Regulatory perimeter and economic function
Market function
The regulated stock market reduces transaction costs, improves price discovery and
facilitates the transfer of risk between operators with different horizons and preferences.
At the macro level, the ability of companies to raise risk capital increases and accelerates
the reallocation of savings towards high productivity projects.
Regulatory basis
The European framework (MiFID/MiFIR, MAR, Prospectus Regulation, CSDR, EMIR) and national regulations
define rules on pre/post-trade transparency, market abuse, admission to listing,
clearing-settlement and continuous information obligations.
Consistency between primary sources, market regulations and supervisory practices is essential to reduce
legal uncertainty and risk of regulatory arbitrage.
1) Regulated market, MTF and OTF: operational differences
Regulated Market (RM)
Trading venue with more stringent standards on admission of instruments, issuer obligations,
transparency and governance. It is the typical venue for large caps and primary listings.
MTF and OTF
MTF: multilateral system with its own rules, generally more flexible on listing and requirements.
OTF: venue organized mainly for non-equity instruments with greater discretion of the operator.
Economic implications
For the same security, the trading venue influences the depth of the book, spread, resilience and
information credibility. Typically, more robust regulatory standards reduce the information risk premium.
2) Institutional architecture: roles and responsibilities
Market manager
Defines regulation, technical rules, segmentation, admission procedures and suspension/interruption mechanisms. Manages first-level surveillance of market operations.
Supervisory authority
Supervisory authorities oversee transparency, correct disclosure, and market integrity. They intervene on
market abuse, lack of disclosure, violations of conduct and systemic critical issues.
Post-trade infrastructure
CCP (clearing) manages counterparty risk via netting and margins; CSD (settlement/custody)
ensures delivery of securities and monetary settlement. Post-trade robustness is central to market confidence.
3) Admission requirements for issuers
Economic-financial requirements
Track record, capital structure, adequate capitalization and sustainability of the business model.
The objective is to reduce the risk of admission of inadequately mature issuers.
Information requirements and governance
Information prospectus, audited financial statements, governance structure consistent with best practices, safeguards
internal control and reliable periodic reporting to the market.
Free float and expected liquidity
Minimum free float thresholds and diffusion among investors are essential to ensure tradability,
reduce ownership concentration and contain the risk of manipulation on thinly traded securities.
4) Initial disclosure and ongoing disclosure
Initial disclosure (IPO/listing)
Includes information on strategy, risks, use of proceeds, shareholding structure, governance,
disputes and historical performance. Complete disclosure reduces ex ante information asymmetry.
Ongoing disclosure
Periodic information (financial statements, half-yearly reports, guidance) and immediate price-sensitive disclosure.
The timeliness and consistency of the information flow directly affects the volatility and cost of capital.
Information quality and pricing
Less information opacity tends to reduce the adverse selection component of the bid-ask spread,
improving liquidity and the valuation multiple recognized by the market.
5) Licensed intermediaries and rules of conduct
Market access
Intermediaries must possess capital, organizational and technological requirements to participate
in trading and post-trade, with ex ante controls on operational risk and regulatory compliance.
Best execution and customer protection
Best execution rules impose execution policies oriented towards the best overall result
(price, cost, speed, probability of execution and settlement).
Conflicts of interest
Chinese walls, governance of information flows and escalation procedures are necessary to avoid
improper use of information and distortions in managing customer orders.
Stock market microstructure and trading integrity
Microstructure determines how orders become prices. Rules on priorities, transparency,
continuous auction, opening/closing auctions and interruption management affect allocative efficiency,
stability and trading costs.
6) Order book, priorities and price formation
Price-time priority mechanism
Orders are sorted by best price and, being equal, by entry time. The rule incentivizes
price competition and predictability in execution.
Negotiation phases
Pre-auction, opening auction, continuous trading, any volatility auctions and closing auction.
Each phase has different purposes: initial discovery, intraday liquidity, final stabilization.
Order types
Limit, market, stop, iceberg, conditional orders. The choice of order influences execution risk,
market impact and probability of fill.
7) Liquidity, spread and depth: quantitative measures
Bid-ask spreads
Measure the immediate transaction cost:
\[
Spread_{rel} = \frac{Ask-Bid}{(Ask+Bid)/2}
\]
A lower spread generally indicates better liquidity and lower perceived information risk.
Turnover and exchange speed
Summary activity indicator:
\[
Turnover\ Velocity = \frac{Annual\ Traded\ Volume}{Average\ Market\ Capitalization}
\]
High speed signals a lively market, but should be read together with the quality of the order flow.
Price impact
Measures the price change induced by the execution of large orders.
High impact indicates a thin or unbalanced book and increases the implicit cost for institutional investors.
8) Clearing, netting, margins and settlement
Role of the CCP
The central counterparty intervenes between buyer and seller, reducing bilateral risk.
Manages initial margin, variation margin and default funds.
Netting and absorbed capital
Netting reduces gross exposures and liquidity needs. The quality of the netting affects the cost
operational performance of intermediaries and on resilience under stress conditions.
Settlement disciplines
Rules on fail, penalties and buy-in (where applicable) encourage timely settlement and reduce
risk of operational contagion along the post-trade chain.
9) Market integrity: market abuse and surveillance
Insider dealing
Use of inside information to trade before public disclosure. It is among the most serious violations because it undermines trust and informational equality among participants.
Market manipulation
Conduct that artificially alters prices/volumes (spoofing, layering, wash trades, marking the close).
Algorithmic surveillance is fundamental to intercept anomalous patterns in real time.
Transaction reporting and audit trail
Complete traceability of orders and operations allows forensic reconstruction of events and increases
deterrence against abuses, improving the institutional quality of the market.
10) Volatility, circuit breaker and operational continuity
Volatility auctions
In the presence of rapid movements, the market can activate auctions to rebuild supply-demand balance
and reduce the risk of disorderly pricing.
Circuit breaker
Predetermined thresholds temporarily halt trading in the event of extreme shocks,
limiting feedback loops and panic trading.
Infrastructure resilience
System redundancy, business continuity plans and cyber controls are part of technical governance
minimum for high reliability markets.
Stock market governance: strategic and policy perspective
Market governance is not just regulatory compliance: it is a balance between allocative efficiency,
investor protection, microstructural innovation and systemic resilience. Effective governance reduces the cost of capital for companies and increases the competitiveness of the financial center.
11) Internal control model (three lines of defense)
Front line
Operational functions and business owners: monitor risks on a day-by-day basis (execution, IT, data quality,
commercial conduct).
Second line
Risk management and compliance: define frameworks, limits, monitoring and escalation towards top bodies.
Third line
Independent internal audit: checks the overall effectiveness of the system and robustness of the controls,
with tracked and measurable remediation plans.
12) Market quality KPIs and continuous monitoring
Microstructural KPIs
- Average and median spread by capitalization band
- Depth at the first levels of the book
- Average execution time
- Settlement failure rate
Health KPIs
- Abuse alert number/100k orders
- Investigative take-over time
- False positive rate in surveillance systems
- Transaction reporting completeness
Attractiveness KPIs
IPO number, post-listing retention, implicit trading cost and liquidity performance
they are key indicators for evaluating the international competitiveness of the venue.
13) Effects on the cost of capital and company valuations
Equity risk premium channel
Greater transparency and better investor protection reduce the required risk premium,
with a positive effect on market multiples and equity raising capacity.
Liquidity channel
More liquid markets reduce the liquidity discount in valuations and improve contestability
of capital, encouraging long-term institutional investors.
Reputational channel
High standards of governance and credible enforcement increase foreign trust,
reducing the home bias of international investors.
14) Operational summary for academic and professional analysis
Key questions
- Do the access rules balance the quality and contestability of the listing?
- Does the microstructure minimize adverse selection and market impact?
- Are the anti-abuse measures effective and proportionate?
- Is post-trade resilient in stress scenarios?
Methodological approach
Integrating qualitative regulatory analysis with quantitative evidence (spread, depth, fail rate, intraday volatility) allows a non-descriptive but causal assessment of market quality.
Expected output
Good governance produces deeper, less fragile and more competitive markets, with simultaneous benefits for issuers, investors, and the overall stability of the financial system.
15) Formal requirements of the regulated market (Chapter 6 scheme)
Minimum institutional requirements
- Registration in a specific list kept by CONSOB.
- Smooth and continuous operation according to approved rules.
- Governance by specific laws and regulations.
- Management entrusted to an authorized management company.
In substantial terms, CONSOB authorization is not a one-off act: it requires continuous monitoring
of the organisational, technological and governance requirements to maintain the suitability of the venue.
Transparency and information obligations
The market requires intermediaries to have pre-trade and post-trade transparency, along with reporting obligations on operations and conduct consistent with best execution and integrity of trades.
The objective is to reduce information asymmetries and risk of manipulation, preserving the trust of retail and institutional investors.
Transparency also includes quality controls on market data distributed in real time:
latency, flow integrity and consistency between execution venues and post-trade reporting.
16) Italian Stock Exchange: historical evolution and ownership structure
Privatization in the 90s
In the second half of the nineties the transition to a private market-management model was consolidated, in a context of liberalization and reduction of the direct role of the State in the economy.
The privatizations of large groups (e.g. telecommunications, energy, credit, public industry)
are consistent with objectives of efficiency, innovation, competition and public debt reduction.
International integrations
- 2007: integration with London Stock Exchange Group.
- 1 June 2009: FTSE MIB replaces S&P/MIB as main index.
- 2021: entry into the Euronext group.
- Acquisition of CC&G within the Euronext perimeter (post-trade).
Cross-border integration has increased technological scale, regulatory interoperability and
access to a broader investor base, with effects on the international visibility of Italian issuers.
Manager's strategic objectives
Development of managed markets and maximization of liquidity, transparency, competitiveness and efficiency.
Operationally this means attracting issuers, expanding the investor base and increasing quality/volume
of exchanges.
The balance between volume growth and execution quality is central: volume without microstructural quality can increase fragility, implicit spreads and reputational cost of the market.
17) Duties and responsibilities of the management company
Market supervision
Supervision of the proper conduct of trading, monitoring of market anomalies and activation
of suspension/interruption procedures in case of disorderly conditions.
Admission of issuers and intermediaries
Definition of requirements and admission/permanence procedures for issuing companies and operators.
Private investors access the market through authorized intermediaries with direct access.
Permanence on the market is conditional on maintaining the requirements: in the event of violations
relevant are possible segment downgrades, suspensions or revocations of trading.
Financial instruments traded
- Actions.
- Fixed income instruments.
- Derivative instruments.
- Securitized derivatives (covered warrants and certificates).
- UCITS/ETFs and similar instruments according to segmentation.
18) Telematic organization and access to the book
Electronic market
The markets managed are organized electronically, with a network of computers/terminals and protocols
of standardized connectivity to guarantee continuity, controlled latency and traceability.
The quality of the platform (capacity, resilience, recovery time objective) is an integral part
of governance: technical failures can compromise price integrity and trust in the market.
Operating subjects
Only authorized individuals can operate directly. Private customers place orders
through intermediaries who perform suitability, availability, and compliance checks.
Mandatory order elements
- Instrument subject to trading.
- Quantity to be exchanged.
- Order direction (buy/sell).
- Possible price limit and time/phase validity.
In the presence of algorithmic orders, pre-trade filters (price, volume, kill-switch) are mandatory
to contain operational errors and misalignments with risk policies.
19) At-the-best orders, limit orders and execution priorities
Orders without price limit (at-the-best)
They are executed at the best conditions available on the opposite side of the book. They offer more
certainty of execution but less certainty on the final price.
Limit orders
They define the maximum price accepted for purchase and the minimum price accepted for sale.
They increase price control but may remain unexecuted.
Matching hierarchy
- Prioritize compatible no-limit orders.
- Then orders with the best price (higher for buys, lower for sells).
- For the same price, priority arrival time.
This hierarchy minimizes ambiguity in execution and reduces discretion, increasing predictability of the price formation process.
20) MTA: opening auction, continuous trading, and closing auction
Opening auction
In pre-opening the orders accumulate and the system calculates the theoretical opening price.
For blue chips and STAR the pre-auction is held in the morning, and closing can occur within a randomized interval to reduce manipulation at the fixing moment.
During validation, the theoretical price must respect deviation limits from the static price.
At the opening, the system concludes contracts at the validated price.
In operational practice, the pre-auction can extend until around 9:00 with a random end
in the last interval (e.g. 9:00:00-9:00:59), precisely to avoid manipulative timing strategies.
During validation, operators cannot intervene on the book.
Opening price criteria
- Maximize quantity exchanged.
- Minimize imbalance between purchases and sales.
- In case of a tie, use regulatory tiebreakers (side pressure and proximity to last price).
\[
P^{open} = \arg\max_{p}\;V(p)\quad \text{s.t.}\quad \min\;Imbalance(p)
\]
Unexecuted limit orders: transferred to continuous. Unfulfilled unlimited orders: normally cancelled.
Continuous trading and closing auction
Continuously, contracts are concluded when orders become compatible, respecting price-time priority. Intermediaries can modify/cancel orders according to phase rules.
At closing: pre-closing, validation of the theoretical price, final fixing. Limit orders
unexecuted can be transferred to the pre-opening of the following day.
The closing auction improves the significance of the final price of the session, reducing distortions
by micro-volumes in the last seconds of continuous trading.
21) Trading parameters and conditional orders
Parameters for order outcome
- FOK (Fill or Kill): immediate total execution, otherwise cancellation.
- ENE/IOC (Execute and Delete): partial execution allowed; residual quantity canceled.
FOK is useful for avoiding unwanted partial executions on blocks; IOC favors execution speed over complete order fulfillment.
Parameters for time/phase
- GTC: valid until deleted (within system limits).
- GTT: valid until specified date/time.
- ATO / ATC: valid only in opening / closing auction.
- GFA / GFD: valid only for the auction phase / for the session.
The correct use of time validity allows alignment of the execution strategy with the market phase (price discovery in auction vs immediate continuous execution).
Conditional orders continuously
- Stop limit: trigger activation on last price, with limit.
- Stop orders: Unlimited trigger activation (execution priority).
- Iceberg: partial display; when the tranche fills, the next one appears.
Icebergs reduce signaling by the total size but can lose temporal priority on subsequent tranches, depending on the platform rules.
22) Dark pool: rationale, benefits and information constraints
Economic function
Dark venues reduce market impact on large orders thanks to less transparency
pre-trade. They are used for anonymity and better execution quality in relevant blocks.
Benefits and risks
Benefits: lower signaling risk and lower expected slippage. Risks: less transparency, possible
fragmentation of liquidity and complexity of best execution between multiple venues.
On complex instruments or large institutional orders, dark execution can be efficient,
but requires continuous monitoring of price quality compared to lit markets.
Regulatory obligations
Transaction reporting and post-trade publication of volumes/prices are required in several jurisdictions, with deferral rules to balance overall transparency and block-execution protection.
23) Types of prices and reference parameters
Market prices
- Opening price: opening auction fixing.
- Closing price: closing auction fixing.
- Reference price: closing or weighted average (often last minutes of continuous).
- Static price: generally the previous day's reference.
- Official price: continuous weighted average of contracts.
\[
P_{uff}=\frac{\sum_i P_i Q_i}{\sum_i Q_i}
\]
In practice, the reference price can also be a weighted average of the last 10 minutes
of continuous trading, according to the regulations applicable to the segment.
Indicators for financial indexation
The profitability of a security can be linked to financial market indicators
(rates, prices, stock/bond indices), with contractual rules for calculating the payout.
Real, currency and mixed indicators
Real indicators: variables of the productive economy (goods, raw materials, services, inflation).
Currency indicators: exchange rates between currencies or currency baskets.
Mixed: joint combination of several parameters in the same remuneration formula.