由經濟觀點論金融市場上以衍生性商品進行市場投機之管制 (Regulation of Speculation in the Financial Market : Focusing on Derivative Instruments)

本文認為，市場投機本身係經由承擔風險以獲利的行為，經由衍生性商品進行市場投機可協助避險、撮合市場以及協助完整化投資市場，然而，純粹的投機行為可能造成市場效率的淨損失並產生外部成本，並可能衍生資訊不對稱以及濫用市場的問題，甚至可能造成系統性風險，這些可構成限制市場投機的理由。本文以為，於台灣現行法下，可維持以金融機構為中心的規範模式之上，以限制投機交易及減少風險擴大的方式來控制利用衍生性商品進行投機的潛在問題；另就零售市場方面，可更進一步採取若干程度的直接產品規範，以更明確化合約內容以及當事人間的權利義務關係，以減少一般投資人利用衍生性商品投機的不良影響。This article argues that market speculation is a conduct to acquire benefits by undertaking risk. Derivative instruments are powerful tools for market participants to conduct market speculation, which may help hedging, market making and completing investment market. However, pure and excessive speculation might cause net loss of market efficiency and create external costs. Some speculative transactions may imply asymmetric information. Market speculation might also lead to market abuse and even systemic risk. These reasons provide the basis to regulate market speculation by derivatives trading. This paper argues that Taiwan law might build on current regulatory model centring on the type of financial institution and devise legal rules to restraint the amount of speculative transactions and to avoid risk from spreading in order to contain problems from market speculation. In addition, in the retail market, Taiwan law might employ a certain degree of direct product regulation in order to clarify terms of relevant derivative contracts and the rights and obligations of parties in order to reduce the negative consequences of speculation/investment by way of derivative instruments