Secret agreements between apparently unconnected shareholders to act together to manipulate the share price of a company or to influence its management. The Companies Act 1981 laid down that the shares of the parties to such an agreement should be treated as if they were owned by one person, from the point of view of disclosing interests in a company's shareholding.

• London code of conduct
• London Commodity Exchange
• London daily prices
• London Fox
• London Inter Bank Bid Rate
• London Inter Bank Currency Options Market
• London Inter Bank Mean Rate
• London Inter Bank Offered Rate
• London International Financial Futures and Options Exchange
• London International Insurance and Reinsurance Market Association
• London Metal Exchange
• London rules
• London Securities and Derivatives Exchange
• London Stock Exchange
• London Sugar Futures Market
• London Traded Options Market
• London Underwriting Centre
• long-dated forward
• long-dated gilt
• long-funded
• long hedging
• long position
• longs
• long-term bond
• long-term contract