Major financial institutions are raising serious concerns about expanding trading hours. Wells Fargo's research team recently voiced strong opposition to proposals for all-day Nasdaq trading, calling such measures problematic for market stability and participant risk management.

Their criticism centers on operational challenges: extended trading windows would strain market infrastructure, increase execution risks during lower-liquidity periods, and complicate hedging strategies for institutional players. The analysts argue that current market hours exist for good reasons—they protect market integrity and give traders necessary downtime for data processing and risk assessment.

The debate mirrors broader discussions in crypto markets, where 24/7 trading has become standard. While digital asset exchanges operate without traditional closing times, concerns about price volatility, manipulation risks, and trader burnout remain relevant. Traditional finance institutions like Wells Fargo appear hesitant about abandoning the established trading window model, suggesting they believe structured market hours provide stability that round-the-clock access doesn't guarantee.