TradeKing’s Director of Education Nicole Wachs explains how “locked” and “crossed” markets occur, an unusual situation common in fast markets in which the bid-ask relationship behaves differently. System response and access times may vary due to market conditions, system performance, and other factors. Any strategies discussed and examples using actual securities and price data are strictly for illustrative and educational purposes only and are not to be construed as an endorsement, recommendation, or solicitation to buy or sell securities. Past performance is not a guarantee of future results. Consider the following when making an investment decision: your financial situation, your risk profile and transaction costs. All investments involve risk, losses may exceed the principal invested, and the past performance of a security, industry, sector, market, or financial product does not guarantee future results or returns. TradeKing provides self-directed investors with discount brokerage services, and does not make recommendations or offer investment, financial, legal or tax advice. You alone are responsible for evaluating the merits and risks associated with the use of TradeKing’s systems, services or products.