The Experts below are selected from a list of 231498 Experts worldwide ranked by ideXlab platform
Khamis Hamed Al-yahyaee - One of the best experts on this subject based on the ideXlab platform.
-
Investment Board Committee and Investment Efficiency in a Unique Environment
Emerging Markets Finance and Trade, 2020Co-Authors: Baban Eulaiwi, Khamis Hamed Al-yahyaee, Ahmed Al-hadi, Grantley TaylorAbstract:This study investigates the associations between investment efficiency and both the existence of a board investment committee (IC) and its expertise. Using a sample of industrial firms from six Gul...
-
Shareholder Wealth Effects of Stock Dividends in a Unique Environment
Journal of International Financial Markets Institutions and Money, 2014Co-Authors: Khamis Hamed Al-yahyaeeAbstract:We investigate shareholder wealth effects of stock dividends using a Unique dataset from Oman in which many market frictions that are used to explain the stock dividend announcement effect are either absent or limited. We find a positive stock market reaction to stock dividend distributions. We also find that firms that distribute stock dividends experience favorable changes in operating performance during the seven-year period around the stock dividend distribution. Our results suggest that stock dividends are used primarily to signal future operating performance and to a lesser extent to reduce stock prices to an optimal trading range.
-
Stock dividend ex-day effect and market microstructure in a Unique Environment
International Economics, 2014Co-Authors: Khamis Hamed Al-yahyaeeAbstract:This paper examines the stock dividend ex-day effect on the Muscat Securities Market (MSM), which is of interest because several of the market microstructure explanations for the ex-day effect can be ruled out. We find that there are positive abnormal returns on Omani stock dividend ex-days. We also find that firms distributing stock dividends have higher stock prices than firms that are in the same industries but do not distribute stock dividends. In addition, we find that the positive abnormal returns are positively related to stock price increases in the pre-announcement period and to stock dividend percentages. This evidence suggests that stock dividends in Oman might be used to reduce stock prices.
-
Frequency and Motives for Stock Dividends in a Unique Environment
International Review of Finance, 2013Co-Authors: Khamis Hamed Al-yahyaeeAbstract:We investigate the possible differences in the information content of stock dividends between firms that distribute stock dividends frequently (frequent distributors) and firms that distribute stock dividends infrequently (infrequent distributors) using a Unique data set from Oman where the market microstructure frictions are either absent or limited. We find that infrequent stock dividend distributors have higher postdistribution operating performance relative to frequent distributors. We also find that the illiquidity measure is significantly related to the announcement effect only for frequent stock dividend distributors, whereas short-term performance is significantly related to the announcement effect only for infrequent distributors. Our findings indicate that infrequent stock dividends are used mainly to convey favorable private information about the firms’ future prospects, and frequent stock dividends are used to reduce stock price to an optimal trading range in order to improve trading liquidity. JEL classification: G14, G35.
-
Why Do Stock Prices Drop by Less than the Amount of the Dividend? Evidence from a Unique Environment
SSRN Electronic Journal, 2013Co-Authors: Khamis Hamed Al-yahyaeeAbstract:We investigate the effect of a lack of an automated limit order adjustment mechanism on ex-dividend day stock price behavior in a Unique Environment in which there are no taxes on dividends and capital gains. The absence of taxes in Oman allows us to test the effect of the lack of a limit order adjustment mechanism in the absence of confounding tax effects that are present in other markets. We find that overnight drop in the ask price is smaller than the overnight drop in the bid price. In addition, we find that average price drops are smaller than the dividend amount for all dividend sizes. We also find no evidence of a sawtooth-shaped relationship between the dividend amount and the ex-dividend day price drop. These results are generally consistent with a lack of an automated limit order adjustment mechanism.
Christian R. Voolstra - One of the best experts on this subject based on the ideXlab platform.
-
Microbial community composition of deep-sea corals from the Red Sea provides insight into functional adaption to a Unique Environment.
Scientific reports, 2017Co-Authors: Till Röthig, Lauren K. Yum, Stephan Kremb, Anna Krystyna Roik, Christian R. VoolstraAbstract:Microbes associated with deep-sea corals remain poorly studied. The lack of symbiotic algae suggests that associated microbes may play a fundamental role in maintaining a viable coral host via acquisition and recycling of nutrients. Here we employed 16 S rRNA gene sequencing to study bacterial communities of three deep-sea scleractinian corals from the Red Sea, Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus typus. We found diverse, species-specific microbiomes, distinct from the surrounding seawater. Microbiomes were comprised of few abundant bacteria, which constituted the majority of sequences (up to 58% depending on the coral species). In addition, we found a high diversity of rare bacteria (taxa at 90% of all bacteria). Interestingly, we identified anaerobic bacteria, potentially providing metabolic functions at low oxygen conditions, as well as bacteria harboring the potential to degrade crude oil components. Considering the presence of oil and gas fields in the Red Sea, these bacteria may unlock this carbon source for the coral host. In conclusion, the prevailing Environmental conditions of the deep Red Sea (>20 °C,
-
microbial community composition of deep sea corals from the red sea provides insight into functional adaption to a Unique Environment
Scientific Reports, 2017Co-Authors: Till Röthig, Lauren K. Yum, Stephan Kremb, Anna Krystyna Roik, Christian R. VoolstraAbstract:Microbes associated with deep-sea corals remain poorly studied. The lack of symbiotic algae suggests that associated microbes may play a fundamental role in maintaining a viable coral host via acquisition and recycling of nutrients. Here we employed 16 S rRNA gene sequencing to study bacterial communities of three deep-sea scleractinian corals from the Red Sea, Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus typus. We found diverse, species-specific microbiomes, distinct from the surrounding seawater. Microbiomes were comprised of few abundant bacteria, which constituted the majority of sequences (up to 58% depending on the coral species). In addition, we found a high diversity of rare bacteria (taxa at 90% of all bacteria). Interestingly, we identified anaerobic bacteria, potentially providing metabolic functions at low oxygen conditions, as well as bacteria harboring the potential to degrade crude oil components. Considering the presence of oil and gas fields in the Red Sea, these bacteria may unlock this carbon source for the coral host. In conclusion, the prevailing Environmental conditions of the deep Red Sea (>20 °C, <2 mg oxygen L−1) may require distinct functional adaptations, and our data suggest that bacterial communities may contribute to coral functioning in this challenging Environment.
Till Röthig - One of the best experts on this subject based on the ideXlab platform.
-
Microbial community composition of deep-sea corals from the Red Sea provides insight into functional adaption to a Unique Environment.
Scientific reports, 2017Co-Authors: Till Röthig, Lauren K. Yum, Stephan Kremb, Anna Krystyna Roik, Christian R. VoolstraAbstract:Microbes associated with deep-sea corals remain poorly studied. The lack of symbiotic algae suggests that associated microbes may play a fundamental role in maintaining a viable coral host via acquisition and recycling of nutrients. Here we employed 16 S rRNA gene sequencing to study bacterial communities of three deep-sea scleractinian corals from the Red Sea, Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus typus. We found diverse, species-specific microbiomes, distinct from the surrounding seawater. Microbiomes were comprised of few abundant bacteria, which constituted the majority of sequences (up to 58% depending on the coral species). In addition, we found a high diversity of rare bacteria (taxa at 90% of all bacteria). Interestingly, we identified anaerobic bacteria, potentially providing metabolic functions at low oxygen conditions, as well as bacteria harboring the potential to degrade crude oil components. Considering the presence of oil and gas fields in the Red Sea, these bacteria may unlock this carbon source for the coral host. In conclusion, the prevailing Environmental conditions of the deep Red Sea (>20 °C,
-
microbial community composition of deep sea corals from the red sea provides insight into functional adaption to a Unique Environment
Scientific Reports, 2017Co-Authors: Till Röthig, Lauren K. Yum, Stephan Kremb, Anna Krystyna Roik, Christian R. VoolstraAbstract:Microbes associated with deep-sea corals remain poorly studied. The lack of symbiotic algae suggests that associated microbes may play a fundamental role in maintaining a viable coral host via acquisition and recycling of nutrients. Here we employed 16 S rRNA gene sequencing to study bacterial communities of three deep-sea scleractinian corals from the Red Sea, Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus typus. We found diverse, species-specific microbiomes, distinct from the surrounding seawater. Microbiomes were comprised of few abundant bacteria, which constituted the majority of sequences (up to 58% depending on the coral species). In addition, we found a high diversity of rare bacteria (taxa at 90% of all bacteria). Interestingly, we identified anaerobic bacteria, potentially providing metabolic functions at low oxygen conditions, as well as bacteria harboring the potential to degrade crude oil components. Considering the presence of oil and gas fields in the Red Sea, these bacteria may unlock this carbon source for the coral host. In conclusion, the prevailing Environmental conditions of the deep Red Sea (>20 °C, <2 mg oxygen L−1) may require distinct functional adaptations, and our data suggest that bacterial communities may contribute to coral functioning in this challenging Environment.
Lauren K. Yum - One of the best experts on this subject based on the ideXlab platform.
-
Microbial community composition of deep-sea corals from the Red Sea provides insight into functional adaption to a Unique Environment.
Scientific reports, 2017Co-Authors: Till Röthig, Lauren K. Yum, Stephan Kremb, Anna Krystyna Roik, Christian R. VoolstraAbstract:Microbes associated with deep-sea corals remain poorly studied. The lack of symbiotic algae suggests that associated microbes may play a fundamental role in maintaining a viable coral host via acquisition and recycling of nutrients. Here we employed 16 S rRNA gene sequencing to study bacterial communities of three deep-sea scleractinian corals from the Red Sea, Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus typus. We found diverse, species-specific microbiomes, distinct from the surrounding seawater. Microbiomes were comprised of few abundant bacteria, which constituted the majority of sequences (up to 58% depending on the coral species). In addition, we found a high diversity of rare bacteria (taxa at 90% of all bacteria). Interestingly, we identified anaerobic bacteria, potentially providing metabolic functions at low oxygen conditions, as well as bacteria harboring the potential to degrade crude oil components. Considering the presence of oil and gas fields in the Red Sea, these bacteria may unlock this carbon source for the coral host. In conclusion, the prevailing Environmental conditions of the deep Red Sea (>20 °C,
-
microbial community composition of deep sea corals from the red sea provides insight into functional adaption to a Unique Environment
Scientific Reports, 2017Co-Authors: Till Röthig, Lauren K. Yum, Stephan Kremb, Anna Krystyna Roik, Christian R. VoolstraAbstract:Microbes associated with deep-sea corals remain poorly studied. The lack of symbiotic algae suggests that associated microbes may play a fundamental role in maintaining a viable coral host via acquisition and recycling of nutrients. Here we employed 16 S rRNA gene sequencing to study bacterial communities of three deep-sea scleractinian corals from the Red Sea, Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus typus. We found diverse, species-specific microbiomes, distinct from the surrounding seawater. Microbiomes were comprised of few abundant bacteria, which constituted the majority of sequences (up to 58% depending on the coral species). In addition, we found a high diversity of rare bacteria (taxa at 90% of all bacteria). Interestingly, we identified anaerobic bacteria, potentially providing metabolic functions at low oxygen conditions, as well as bacteria harboring the potential to degrade crude oil components. Considering the presence of oil and gas fields in the Red Sea, these bacteria may unlock this carbon source for the coral host. In conclusion, the prevailing Environmental conditions of the deep Red Sea (>20 °C, <2 mg oxygen L−1) may require distinct functional adaptations, and our data suggest that bacterial communities may contribute to coral functioning in this challenging Environment.
Stephan Kremb - One of the best experts on this subject based on the ideXlab platform.
-
Microbial community composition of deep-sea corals from the Red Sea provides insight into functional adaption to a Unique Environment.
Scientific reports, 2017Co-Authors: Till Röthig, Lauren K. Yum, Stephan Kremb, Anna Krystyna Roik, Christian R. VoolstraAbstract:Microbes associated with deep-sea corals remain poorly studied. The lack of symbiotic algae suggests that associated microbes may play a fundamental role in maintaining a viable coral host via acquisition and recycling of nutrients. Here we employed 16 S rRNA gene sequencing to study bacterial communities of three deep-sea scleractinian corals from the Red Sea, Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus typus. We found diverse, species-specific microbiomes, distinct from the surrounding seawater. Microbiomes were comprised of few abundant bacteria, which constituted the majority of sequences (up to 58% depending on the coral species). In addition, we found a high diversity of rare bacteria (taxa at 90% of all bacteria). Interestingly, we identified anaerobic bacteria, potentially providing metabolic functions at low oxygen conditions, as well as bacteria harboring the potential to degrade crude oil components. Considering the presence of oil and gas fields in the Red Sea, these bacteria may unlock this carbon source for the coral host. In conclusion, the prevailing Environmental conditions of the deep Red Sea (>20 °C,
-
microbial community composition of deep sea corals from the red sea provides insight into functional adaption to a Unique Environment
Scientific Reports, 2017Co-Authors: Till Röthig, Lauren K. Yum, Stephan Kremb, Anna Krystyna Roik, Christian R. VoolstraAbstract:Microbes associated with deep-sea corals remain poorly studied. The lack of symbiotic algae suggests that associated microbes may play a fundamental role in maintaining a viable coral host via acquisition and recycling of nutrients. Here we employed 16 S rRNA gene sequencing to study bacterial communities of three deep-sea scleractinian corals from the Red Sea, Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus typus. We found diverse, species-specific microbiomes, distinct from the surrounding seawater. Microbiomes were comprised of few abundant bacteria, which constituted the majority of sequences (up to 58% depending on the coral species). In addition, we found a high diversity of rare bacteria (taxa at 90% of all bacteria). Interestingly, we identified anaerobic bacteria, potentially providing metabolic functions at low oxygen conditions, as well as bacteria harboring the potential to degrade crude oil components. Considering the presence of oil and gas fields in the Red Sea, these bacteria may unlock this carbon source for the coral host. In conclusion, the prevailing Environmental conditions of the deep Red Sea (>20 °C, <2 mg oxygen L−1) may require distinct functional adaptations, and our data suggest that bacterial communities may contribute to coral functioning in this challenging Environment.
