Securities

Market Hours

Introduction

The Exchangeexchange property of a Security object contains information about the exchange that lists the security, including its time zone and the trading days and hours. To get the exchange market hours, use the Exchange.Hoursexchange.hours property on a Security object. 

// Get properties of the exchange that lists the security.
var securityExchangeHours = Securities["SPY"].Exchange.Hours;
# Get properties of the exchange that lists the security.
security_exchange_hours = self.securities["SPY"].exchange.hours

Market Status

To check if the exchange is open at a specific time, call the IsOpenis_open method.

// Check if the exchange is open at a specific time.
var isOpenNow = securityExchangeHours.IsOpen(Time, extendedMarketHours: false);

// Check if the exchange is open at any point in time over a specific interval.
var isOpen = securityExchangeHours.IsOpen(Time, Time.AddDays(1), extendedMarketHours: false);
# Check if the exchange is open at a specific time.
is_open_now = security_exchange_hours.is_open(self.time, extended_market_hours=False)

# Check if the exchange is open at any point in time over a specific interval.
is_open = security_exchange_hours.is_open(self.time, self.time + timedelta(days=1), extended_market_hours=False)

To check if the exchange is open on a specific date, call the IsDateOpenis_date_open method.

// Check if the exchange is open at a specific date.
var isOpen = securityExchangeHours.IsDateOpen(Time, extendedMarketHours: true);
# Check if the exchange is open at a specific date.
is_open = security_exchange_hours.is_date_open(self.time, extended_market_hours=True)

To get the next market open time, call the GetNextMarketOpenget_next_market_open method.

// Get the next market open time.
var marketOpenTime = securityExchangeHours.GetNextMarketOpen(Time, extendedMarketHours: false);
# Get the next market open time.
market_open_time = security_exchange_hours.get_next_market_open(self.time, extended_market_hours=False)

To get the next market close time, call the GetNextMarketCloseget_next_market_close method.

// Get the next market close time.
var marketCloseTime = securityExchangeHours.GetNextMarketClose(Time, extendedMarketHours: false);
# Get the next market close time.
market_close_time = security_exchange_hours.get_next_market_close(self.time, extended_market_hours=False)

To get the previous trading day, call the GetPreviousTradingDayget_previous_trading_day method.

// Get the previous trading day.
var day = securityExchangeHours.GetPreviousTradingDay(Time);
# Get the previous trading day.
day = security_exchange_hours.get_previous_trading_day(self.time)

To get the next trading day, call the GetNextTradingDayget_next_trading_day method.

// Get the next trading day in datetime format.
var day = securityExchangeHours.GetNextTradingDay(Time);
# Get the next trading day in datetime format.
day = security_exchange_hours.get_next_trading_day(self.time)

Extended Market Hours

By default, your security subscriptions only cover regular trading hours. To subscribe to pre and post-market trading hours for a specific asset, enable the extendedMarketHoursextended_market_hours argument when you create the security subscription.

AddEquity("SPY", extendedMarketHours: true);
self.add_equity("SPY", extended_market_hours=True)

You only receive extended market hours data if you create the subscription with minute, second, or tick resolution. If you create the subscription with daily or hourly resolution, the bars only reflect the regular trading hours.

Properties

The SecurityExchange object has the following attributes:

Examples

Example 1: Only Within 1 Hour Of Market Open And Close

Buying SPY shortly after market holidays or weekend breaks can be a profitable strategy. Historically, the market has tended to experience positive returns in the trading sessions immediately following extended market closures. This is often attributed to the release of pent-up demand and information during the downtime. By positioning into SPY at the open or within the first few trading hours after a holiday or weekend, investors may be able to capture this post-break bounce in the broader market.

private Equity _spy;
        
public override void Initialize()
{
    // Daily data
    _spy = AddEquity("SPY", Resolution.Hour);
}

public override void OnData(Slice slice)
{
    if (!slice.Bars.ContainsKey(_spy.Symbol)) return;

    // Check if the previous day is holiday
    if (_spy.Exchange.Hours.Holidays.Contains(slice.Bars[_spy.Symbol].Time.AddDays(-1)))
    {
        // Buy if it is a holiday a day before
        SetHoldings(_spy.Symbol, 1);
    }
    else if (Portfolio[_spy.Symbol].Invested)
    {
        // Liquidate otherwise if any open position
        Liquidate(_spy.Symbol);
    }
}
def initialize(self) -> None:
    # Daily data
    self.spy = self.add_equity("SPY", Resolution.HOUR)

def on_data(self, slice: Slice) -> None:
    if self.spy.symbol not in slice.bars:
        return
    
    # Check if the previous day is holiday
    if slice.bars[self.spy.symbol].time - timedelta(1) not in self.spy.exchange.hours.holidays:
        # Buy if it is a holiday a day before
        self.set_holdings(self.spy.symbol, 1)
    elif self.portfolio[self.spy.symbol].invested:
        # Liquidate otherwise if any open position
        self.liquidate(self.spy.symbol)

Example 2: Pre-market Short Limit Order

A pre-market short limit order is a type of order placed before the regular trading session begins. It allows a trader to take a short position at a price higher than the current market price, with the intention of selling the position shortly after the market opens and profiting from the expected price decline. This strategy is often used by traders who anticipate a decline in the asset's value and want to capitalize on it.

private Equity _spy;
        
public override void Initialize()
{
    // Enable extended market hours feed
    _spy = AddEquity("SPY", extendedMarketHours: true);
}

public override void OnData(Slice slice)
{
    if (!slice.QuoteBars.ContainsKey(_spy.Symbol)) return;

    var exchangeHours = _spy.Exchange.Hours;
    // Check it is extended market hours before market open and no position/open order
    if (IsBeforeMarketOpenExtendedHours(exchangeHours, slice.Time)
        && !Portfolio[_spy.Symbol].Invested
        && Transactions.GetOpenOrderTickets(_spy.Symbol).Count() == 0)
    {
        // Short sell at a higher quote
        LimitOrder(_spy.Symbol, -10, slice.QuoteBars[_spy.Symbol].Bid.Close * 1.005m);
    }
    // Check if the normal market is opening and any position
    else if (exchangeHours.IsOpen(slice.Time, extendedMarketHours: false) && Portfolio[_spy.Symbol].Invested)
    {
        // Close the short position
        Liquidate(_spy.Symbol);
    }
}

private bool IsBeforeMarketOpenExtendedHours(SecurityExchangeHours exchangeHours, DateTime time)
{
    // Check if it is extended market hours before market open 
    // Check by if the extended market is open and if the next non-extended market open is on the same day
    return exchangeHours.IsOpen(time, extendedMarketHours: true)
        && exchangeHours.GetNextMarketOpen(time, extendedMarketHours: false).Day == time.Day;
}
def initialize(self) -> None:
    # Enable extended market hours feed
    self.spy = self.add_equity("SPY", extended_market_hours=True)

def on_data(self, slice: Slice) -> None:
    if self.spy.symbol not in slice.quote_bars:
        return
    
    exchange_hours = self.spy.exchange.hours
    # Check it is extended market hours before market open and no position/open order
    if is_before_market_open_extended_hours(exchange_hours, slice.time) \
        and not self.portfolio[self.spy.symbol].invested \
        and not self.transactions.get_open_order_tickets(self.spy.symbol):
        # Short sell at a higher quote
        self.limit_order(self.spy.symbol, -10, slice.quote_bars[self.spy.symbol].bid.close * 1.005)
    # Check if the normal market is opening and any position
    elif self.portfolio[self.spy.symbol].invested and self.portfolio[self.spy.symbol].invested:
        # Liquidate otherwise if any open position
        self.liquidate(self.spy.symbol)
    
def is_before_market_open_extended_hours(self, exchange_hours: SecurityExchangeHours, time: datetime) -> bool:
    # Check if it is extended market hours before market open 
    # Check by if the extended market is open and if the next non-extended market open is on the same day
    return exchange_hours.is_open(time, extended_market_hours=True)\
        and exchange_hours.get_next_market_open(time, extended_market_hours=False).day == time.day

However, it is important to note that pre-market trading can be more volatile and riskier than regular trading, and the intended price may not be achieved on this strategy.

Example 3: Last Hour Trades

Establishing a scheduled trading event in the hour before market close can be an effective strategy. This allows the trader to analyze market conditions, identify potential trade opportunities, and prepare orders ahead of the close. By emitting their trading insights and planned actions to the market in this critical final hour, the trader can influence other market participants and potentially gain an edge.

private Equity _spy;

public override void Initialize()
{
    _spy = AddEquity("SPY");

    // Set up a portfolio construction model to handle insights for trading
    SetPortfolioConstruction(new EqualWeightingPortfolioConstructionModel(Expiry.EndOfDay));

    // Set up a scheduled event on 1-hour before market close to open position
    Schedule.On(
        DateRules.EveryDay(_spy.Symbol),
        TimeRules.BeforeMarketClose(_spy.Symbol, 60),
        LastHourTrade
    );
}

private void LastHourTrade()
{
    // Get the time of next market close
    var marketCloseTime = _spy.Exchange.Hours.GetNextMarketClose(Time, extendedMarketHours: false);
    // Emit an insight that expires 1 minutye before the next market close
    EmitInsights(Insight.Price(_spy.Symbol, marketCloseTime.AddMinutes(-1), InsightDirection.Up));
}
def initialize(self) -> None:
    self.spy = self.add_equity("SPY")

    # Set up a portfolio construction model to handle insights for trading
    self.set_portfolio_construction(EqualWeightingPortfolioConstructionModel(Expiry.END_OF_DAY))

    # Set up a scheduled event on 1-hour before market close to open position
    self.schedule.on(
        self.date_rules.every_day(self.spy.symbol),
        self.time_rules.before_market_close(self.spy.symbol, 60),
        self.last_hour_trade
    )

def last_hour_trade(self) -> None:
    # Get the time of next market close
    market_close_time = self.spy.exchange.hours.get_next_market_close(self.time, extended_market_hours=False)
    # Emit an insight that expires 1 minutye before the next market close
    self.emit_insights(Insight.price(self.spy.symbol, market_close_time - timedelta(minutes=1), InsightDirection.UP))

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