• The Journal of Information Technology
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• v.8 no.4
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• pp.75-90
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• 2005

In this paper I examined trades of general bank In KTB212 Futures for patterns which are best described by the behavioral finance literature. I reported the statistics for traders of profit or loss traders, number of traders, total trader gross trading income, revenue per contract. Thess results are acquired from the revenue scale and the trade contract scale. When traders are ranked on the basis of performance, successful winning traders are short positions in the KTB212. This result appears more faithful to large scale traders. The evidence suggests that large traders are able to act on the information flow. The measure of success is as total income, and the relationship between position holding and success is clear.

• The Korean Journal of Financial Management
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• v.22 no.2
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• pp.189-212
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• 2005

This study examines the interactions between KTB spot and futures markets using the daily prices from March 4, 2002 to January 31, 2005. We use Granger causality test, impulse Response Analysis and Variance Decomposition through vector autoregressive analysis (VAR). However, considering the long-term relationships between the level variables of KTB spot and futures, we introduced Vector Error Correction Model. The main results are as follows. According to the results of Granger-causality test and impulse response analysis, we find that the yields of KTB forward have a great influence on the change of KTB spot but not vice versa. In terms of volatility analysis, there is no inter-dependence between KTB forward and spot markets. In the variance decomposition analysis we find that the short-term KTB forward has much more impact on the KTB spot market than the long-term KTB forward does. We think these results are meaningful for bond investors who are in charge of capital asset pricing valuation, risk management and international portfolio management.

• The Korean Journal of Financial Studies
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• v.8 no.1
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• pp.231-252
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• 2002

2000년 7월부터 채권시가평가의 실행으로 채권운용자들도 채권포트폴리오의 위험을 채권선물을 이용하여 통제하거나 감소시키기 위해 헤지를 하여야 한다. 이때 헤지비율을 추정하는 방법으로는 전통적 회귀분석모형, 백터오차수정모형(Vector Error Correction Model : VECM)과 VAR모형(Vector AutoRegressive Model)이 있다. 전통적인 회귀분석모형에 의하여 추정된 헤지비율은 시계열자료의 불안정성(nonstationary) 등으로 인하여 잘못 추정될 가능성이 있어 면밀한 검토와 분석 후 사용하여야 한다. 시계열자료의 불안정성으로 말미암아 야기되는 문제점들을 개선할 수 있는 모형으로서 VECM과 VAR모형이 널리 이용되고 있다. 따라서 본 연구는 VECM과 VAR모형을 사용하여 추정된 헤지비율과 전통적 회귀분석모형을 사용하여 추정한 헤지비율을 비교하여 어떤 모형으로 추정한 헤지비율이 더 정확한지를 평가하는데 목적을 두고 있다. 즉, 본 연구는 KTB 현 선물의 헤징에 대한 연구로 2000년 1월 4일부터 2001년 7월 27일까지 385일간의 KTB 현 선물 자료와 불룸버그 국채지수를 대상으로 VECM 및 VAR모형과 전통적 회귀분석모형에 의한 헤지비율을 추정하고 각 모형의 설명력과 예측력을 비교하고자 한다. 이 연구의 실증분석 결과, KTB 현물가격과 KTB 선물가격간, 블룸버그 국채지수와 KTB 선물가격간에는 공적분 관계가 존재하며, VECM 및 VAR와 전통적 회귀분석모형을 이용하여 추정한 최적헤지비율의 크기는 대동소이(大同小異)하며, 전통적 회귀분석방법을 이용하는 것이 VECM과 VAR모형을 이용할 때 보다 설명력과 예측력이 우월한 것으로 나타났다.

• Journal of the Korean Society of Tobacco Science
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• v.24 no.1
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• pp.7-12
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• 2002

During the screening or antiviral substances having inhibitory effect on tobacco mosaic virus(TMV) infection to tobacco plants, we found that a bacterial isolate, KTB61, which was identified as a Pseudomonas sp., strongly inhibited the formation of TMV local lesions. When the culture filtrate from KTB61 was applied on the upper surface of leaves of N. tabaccum Xanthi-nc tobacco at the same time of or 24 hours before TMV inoculation, almost complete inhibition was achieved. Incidence of systemic TMV infection to the susceptible tobacco cultivar, NC82, was reduced by 95% when TMV was inoculated onto the upper surface of leaves 24 hours after spraying the culture filtrate. Also 75∼80% of inhibitory effect was obtained by the inoculation of TMV onto the under surface of the leaves treated with culture filtrate 24 hours beforehand. In field trials, the TMV infection was reduced by 96.5% when the tobacco seedlings, N. tabaccum cv. NC82, were soaked with culture filtrate before transplanting.

• The Korean Journal of Financial Management
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• v.21 no.2
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• pp.183-209
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• 2004

This paper uses both the bivariate GARCH type BEKK error correction model and Bivariate-AR(1)-Markov-Switching-VECM model to estimate the volatility, time-varying correlation and hedge ratio for the KTB spot and futures indexes, sampled daily over 1/4/2000-10/30/2003. This study suggests that the volatility regime has more significant influence on KTB markets than incline/decline regime does. The results support the importance of the bivariate model in stead of univariate model between KTB spot and futures markets, which may consider not only individual variance process but also covariance process at the same time.

• Journal of Industrial Convergence
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• v.3 no.1
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• pp.3-18
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• 2005

The purpose of this study is to examine the relationship between KOSPI200 Futures and KTB Futures in inter market and intra market. We are focusing on which market would be lead. The empirical results have indicated that there are no lead or lag effect between KOSPI200 Futures and KTB Futures market. But some positive correlation appeared, we used to know negative correlation between stock and bond market, which is a new finding. As a conclusion, the market still have an efficiency with co-movement.

• The Korean Journal of Financial Management
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• v.19 no.1
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• pp.153-181
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• 2002

본 논문은 1999년 1월부터 2000년 12월까지 코스닥증권시장에 등록한 벤처기업의 IPO를 대상으로 발행시장에서 벤처캐피탈리스트의 역할을 살펴보고 있다. 특히 미국의 발행시장에서는 벤처캐피탈리스트가 투자한 기업이 조기에 공개되는 현상이 나타나는 것으로 보고되고 있는 바, 우리나라에서도 이러한 현상이 존재하는지를 실증적으로 조사하고 있다. 코스닥증권시장에 등록한 벤처기업의 IPO를 대상으로 발행시장에서 벤처캐피탈리스트의 역할에 관한 우리의 연구 결과는 다음과 같다. 첫째, 벤처기업과 비벤처기업의 초기 초과수익률의 차이분석에서, 벤처기업은 $AR_1$에서 할인 발행의 정도가 적어 Megginson-Weiss(1991)의 결과와 유사한 것으로 나타났지만, $AR_2$에서 발행가격 결정시 고려하지 못하는 비계수적 환경요인 등 미래기대수익에 대한 일반투자자의 평가가 호의적으로 나타나 발행회사의 입장에서는 할인발행의 정도가 큰 것으로 나타났다. 이는 이기환 임병균 최해술(1998), 장상수 길재욱(2000) 등의 연구와 유사한 결과를 보이고 있다. 둘째, 벤처캐피탈리스트의 명성에 따라 초기 초과수익률에 차이가 있었다. 즉, KTB지원기업의 초기 초과수익률이 낮았다. 셋째, 벤처캐피탈리스트의 보유지분을 변동에 대한 차이는 IPO전 평균보유지분율은 비KTB가 높았으나 공개 후 평균보유지분율은 KTB가 높았다. 이때 보유지분을 변동이 적은 KTB 지원기업의 초기 초과수익률이 낮았다. 특히 업력과 총자산의 규모가 할인발행을 줄이는 역할을 하는 것으로 나타났다. 업력은 Muscarella-Vetsuypens(1989)의 연구와 일치하고 있다. 넷째, 2개 이상의 벤처캐피탈리스트로부터 공동으로 투자받은 벤처기업의 초기 초과수익률이 하나의 벤처캐피탈로부터 단독으로 투자받은 벤처기업의 초기 초과수익률보다 낮았다. 그러나 통계적 유의성은 없었다. 다섯째, IPO까지 소요기간의 차이가 있는지에 대한 분석에서 비KTB지원기업이 보다 빨리 공개되고 있어 조기업적과시현상(grandstanding)을 보였다. 이는 Gompers(1996)의 연구와 일치한다. 여섯째, 등록주선인의 시장점유율에 차이가 있는지를 분석한 결과, KTB가 투자한 벤처기업 등록주선인의 평균시장점유율이 낮았다. 그러나 통계적 유의성은 없었다.

• The Plant Pathology Journal
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• v.20 no.4
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• pp.293-296
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• 2004

During the screening of antiviral substances having inhibitory effects on Tobacco mosaic virus (TMV) infection on tobacco plants, we found a bacterial isolate KTB3, and identified it as Acinetobacter sp. which strongly inhibited the infection of TMV When the culture filtrate from KTB3 was applied on the upper surface of the Xanthi-nc tobacco leaves at the same time, or 24 hours before TMV inoculation, almost complete inhibition was achieved. Likewise, 86% inhibition was achieved, when the culture filtrate was applied on the underside of the leaves. In field trials, transmission of TMV from diseased seedlings to healthy ones during transplanting work was reduced by 92%, when the culture filtrate was sprayed onto the tobacco seedlings, cv. NC82, 24 hours before transplanting. No toxic effect was observed on the tobacco plants. Antiviral substance from the culture filtrate was purified by ethanol precipitation, dialysis, DEAE-cellulose, and Sephadex G75 gel column chromatography. The partially purified active material which showed positive color reaction to sugar and protein inhibited TMV infection by 60% at 1 ${\mu}$g/ml.

• Management & Information Systems Review
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• v.30 no.2
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• pp.257-275
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• 2011

The price relationship between the futures market and the underlying spot market has attracted the attention of academics, practitioners, and regulators due to their roles during periods of turbulence in financial markets. The purpose of this paper is to investigate the dynamic of price relationship(or lead-lag relationship) between Korean Treasury Bond futures market and spot market. To examine the nature of the price relationship, descriptive statistics, serial correlation, and cross-correlation are used as a preliminary statistics in the Korean Treasury Bond spot and futures market. Next, following Stoll-Whaley(1990) and Chan(1992), the multiple regression method is used to examine the lead-lag patterns between the two markets. The empirical results are summarized as follows. The mean returns of spot markets and future markets are positive(+) and negative(-) respectively and the standard deviation of both stock and futures returns increase through the sub-periods. For the most periods, there is negative skewness in the both markets. The zero excess kurtosis due to the heavy tails of the distribution are relatively large. The autocorrelations in the spot returns for the sample periods are positive in time lag 1, but the autocorrelations in the future returns shows no significant evidence. The results of the daily cross-correlations between the KTB spot and futures returns indicate that a lead-lag relationship don't exist for price changes of futures and spot markets as a preliminary analysis. Finally, empirical results of regression analysis for both market indicate that there is no evidence that the KTB futures lead the KTB spot market, or the KTB spot market lead the KTB futures market. These results are robust for all sub-periods.

• The Journal of the Korea Contents Association
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• v.13 no.9
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• pp.344-354
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• 2013

The objective of this study is to investigate the effects of FRB's policy rate adjustments on the 10 years Korea Treasury Bond (KTB) market. Our results are summarized as follows. First, it is found that the FRB's policy rate adjustments are statistically significant positive impact on the 10 years KTB yield. Based on projection, the 10bp increases in FRB's policy rate generates 7bp higher in 10 years KTB yield. Second, the result from after the Lehman bankruptcy in '08 is found to be statistically significant, while that of before financial crisis is not. Third, the variable, in which consistent with yield difference between the 10 years UTB(US Treasury Bond) and the 10 years KTB, is found that is statistically significant positive impact in 1% significance level. And also given that Brunner(2000) exhibited that the Federal Fund Rate innovations are found to impact on other economic variables through the impulse response, the 10 years KTB yield is found to respond to innovation in the Federal Fund Rate up to about 12 months.