This paper investigates the liquidity and the bid-ask spread components of the Taiwan Stock Exchange Capitalization Weighted Stock Index futures contracts, Taiwan Stock Exchange Electronic Sector Index futures contracts, and Taiwan Stock Exchange Banking and Insurance Sector Index futures contracts traded on the Taiwan Futures Exchange, which switched from an electronic periodic call auction market to an electronic continuous auction market on July 29th 2002. It is a rare opportunity to deeply examine the liquidity and transaction cost components of financial derivatives under different trading mechanisms. Using intraday transaction data of transaction and quotes covering from March 2002 to May 2002 for the old trading mechanism and from October 2002 to December 2002 for the new trading mechanism, liquidity measures and bid-ask spread components are examined before and after the enforcement of the electronic continuous auction mechanism. First, for each type of futures contracts, liquidity measures including bid-ask spread, trading volume, trade number, trade size, volatility, and liquidity ratio are explored to show the multifacet of liquidity. Next, the model of Lin, Sanger, and Booth (1995) is used to decompose the spreads of each product in the two periods. The empirical results show that quote spreads, effective spreads, percentage effective spreads, and dollar-weighted percentage effective spreads of the new system are all significantly lower than those measures in the old system for all of the three types of futures contracts. However, other liquidity measures do not show the same patterns. Overall, improvement of liquidity is found for futures contracts but not very consistent though. Multifacet of liquidity is showed by different measures, although two of these measures, including trade size and trade number, may not be suitable for this study. Moreover, the adverse selection is the most important component in the call auction market, which decreases in the continuous auction market. However, the change of other components, including order processing cost and order persistence, does not demonstrate the same pattern. The results indicate that the electronic continuous auction system protects uninformed traders from being hurt by informed traders. However, we also show that each type of futures contracts has its own specific component structure.

臺灣之證券及期貨市場及相關單位是否合併、如何合併，自2003年起便有相關的討論出現，期間也因許多因素使此政策一變再變，遲遲無法達成共識並實行。 　　整併是否必為正面效應，衡量之標準及時間並無標準，由不同的角度或時間觀之必有不同，因此本文將不著重在是否應整併及整併之利弊分析上，而是以既定之整併政策方向為前提，觀察他國整併實例，嘗試找出適合臺灣的整併模式及分工。 　　證券及期貨市場及相關單位的整併除了不同模式間之選擇問題外，更大的難題乃是在於整併時之法律問題及整併後面臨最大的難題－交易所之公益角色與營利目的之衝突；前者我國已有採取控股公司模式之定論，也為理論上較適於我國之模式，後者則是本文的討論重點──如何維護交易所之公益功能，包括相關法令規範的建置、交易所控股公司及旗下相關子公司之自律，以及政府之妥善監理等。

期貨交易法，事實上即為衍生性商品交易法，隨著衍生性商品發展推陳出新，在其高隱蔽與高槓桿的特性下，對於市場之波動甚至更甚於傳統基礎證券商品，而有管制之必要。我國於民國86年間訂定期貨交易法第107條內線交易禁止之規定，嗣又於105年11月9日為首次之修正，惟修正後仍有諸多疑慮，例如就連結至有價證券之期貨交易乙節，是否即已完全排除法規套利之誘因？而不區分連結之商品類型，一概適用期貨交易法是否妥適？又期貨交易法第107條部分體例如獲悉、消息成立等節，係採與證券交易法第157條之1相異之用語，適用上應如何解釋？就此，本論文交互對照證券交易法第157條之1之規定及比較法上美國之立法例，建議期貨交易法第107條在近期修正之目標上，應可就連結至有價證券之期貨交易增訂準用證券交易法內線交易禁止之規定，或將之參諸證券交易法第157條之1規定自期貨交易法第107條抽出獨立規範；另就諸如消息成立時點、定義、主觀要件等體例設計上與證券交易法統一，俾同時解決法規套利、法規漏洞以及規範解釋適用等疑義。 / With the frequent business and finance development, the concealment and leverage of derivative commodities are obviously higher than before. This shows the necessity and importance of the legal governance. Article 107 of the Futures Trading Act regarding the forbidden of insider trading was promulgated in 1997, and revised firstly in 2016. However, is the aforesaid amendment enough to eliminate the incentive of insider trading for the commodities derived from securities? Is the amendment which directly governs all kinds of futures trading without distinguishing by the nature thereof proper?And how to interpret the terms of “knowing”, “the establishment of information” of the Futures Trading Act since they are inconsistent with the Article 157-1 of the Securities and Exchange Act? For those aforementioned doubts, referring to the Securities and Exchange Act and the United States law system, this study suggests that the Futures Trading Act may adopt the following revisions: 1. The futures trading derived from securities and commodities shall be governed respectively. 2. Those terms such as “knowing”, “the establishment of information” which are irrelevant with the nature of futures trading shall be consistent with the Securities and Exchange Act.