Margin Rules, Informed Trading in Derivatives, and Price Dynamics

We analyze the impact of option trading and margin rules on the behavior of informed traders and on the micro structure of stock and option markets. In the absence of binding margin requirements, the introduction of an options market causes informed traders to exhibit a relative trading bias towards the stock because of its greater information sensitivity. In turn, this widens the stock's bid-ask spread. But when informed traders are subject to margin requirements, their bias towards the stock is enhanced or mitigated depending on the leverage provided by the option relative to the stock, leading to wider or narrower stock bid-ask spreads. The introduction of option trading, with or without margin requirements, unambiguously improves the informational efficiency of stock prices. Margin rules improve market efficiency when stock and option margins are sufficiently large or small but not when they are of moderate size

Margin Rules, Informed Trading in Derivatives and Price Dynamics

We analyze the impact of option trading and margin rules on the behavior of informed traders and on the microstructure of stock and option markets. In the absence of binding margin requirements, the introduction of an options market causes informed traders to exhibit a relative trading bias towards the stock because of its greater information sensitivity. In turn, this widens the stock's bid-ask spread. But when informed traders are subject to margin requirements, their bias towards the stock is enhanced or mitigated depending on the leverage provided by the option relative to the stock, leading to wider or narrower stock bid-ask spreads. The introduction of option trading, with or without margin requirements, unambiguously improves the informational efficiency of stock prices. Margin rules improve market efficiency when stock margins and options margins (relative to stock margins) are sufficiently large or small but not when they are of moderate size

Margin Rules, Informed Trading in Derivatives, and Price Dynamics

We analyze the impact of option trading and margin rules on the behavior of informed traders and on the microstructure of stock and option markets. In the absence of binding margin requirements, the introduction of an options market causes informed traders to exhibit a relative trading bias towards the stock because of its greater information sensitivity. In turn, this widens the stock's bid-ask spread. But when informed traders are subject to margin requirements, their bias towards the stock is enhanced or mitigated depending on the leverage provided by the option relative to the stock, leading to wider or narrower stock bid-ask spreads. The introduction of option trading, with or without margin requirements, unambiguously improves the informational efficiency of stock prices. Margin rules improve market efficiency when stock and option margins are sufficiently large or small but not when they are of moderate size

A case of strongyloidiasis in pregnancy

Helminthic infections such as Strongyloides stercoralis occurs commonly in immunocompromised states. However, they can rarely occur in normal individuals also. A 23 year old multigravida presented at 39 weeks gestation with watery diarrhoea. She was evaluated and diagnosed of strongyloidiasis. Medical management was given and pregnancy outcome was successful. This case is reported because strongyloidiasis is a rare and underreported occurrence in pregnancy, which can occasionally be fatal

Correlation of sociodemographic factors and intestinal parasites in pregnant women

Background: Pregnant women often experience more severe intestinal parasitic infections than their non-pregnant counterparts. Intestinal parasitic infections also disturb pregnancy at the maternal and fetal level. Objective of the study was to find out the prevalence of intestinal parasites in pregnant women and its relationship with various socio-demographic factors.Methods: A single stool specimen was collected. A saline and iodine mount was examined microscopically to demonstrate the intestinal parasites. Formol ether Concentration technique was performed to increase the yield of the eggs and larvae. Modified acid-fast staining was done for opportunistic parasitic infections.Results: In this study 300 pregnant women were screened for presence of intestinal parasites. The prevalence of intestinal parasites was 42.67%. Women who practiced hand washing regularly and had knowledge about parasites had lesser infection. The dietary practice of taking green leafy vegetables had protective effect during pregnancy. The prevalence of intestinal parasites was almost same in both rural and urban women. Higher prevalence of intestinal parasites was found in lower socioeconomic class. Women who used river as source of water supply had slightly more prevalence than those who used municipal water. The prevalence of hookworm infection was more in women who never wore sandals.Conclusions: The high prevalence of intestinal parasites in the pregnant women indicates faecal pollution of soil and domestic water supply.  Education and awareness regarding intestinal parasites need to be done during their routine antenatal visits. Emphasis should be made on consistent hand washing, consumption of washed leafy vegetables and use of footwear. Deworming of pregnant women should be considered in the national guidelines

Influence of Thread Design on Implant Positioning in Immediate Implant Placement

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141508/1/jper1420.pd

Onychomycosis: dermatophytes to yeasts: an experience in and around Mumbai, Maharashtra, India

Background: Onychomycosis is a fungal nail infection having wide range of prevalence in different geographical regions. It becomes imperative to know prevalent causative agent in local area to improve quality of life of patients. Present study was aimed to study epidemiological, clinical and laboratory aspects of onychomycosisMethods: Study was carried out prospectively at a tertiary care teaching hospital Nail scrapings of 630 clinically suspected cases of onychomycosis over a period of 5 years (January 2012 to December 2016) were subjected to KOH examination and culture.Results: Young adults in age group of 21-40 years (67.61%) were predominantly affected with male to female ratio of 1.8:1. Overall prevalence of onychomycosis of the present study is 58.41%. Yeasts were isolated in 47.86%, dermatophytes in 30.71% and non dermatophytic filamentous fungi in 21.43%Conclusions: Present study demonstrates a shift in causative agents from dermatophytes to yeasts.

Effect of Flapless Surgery on Singleâ Tooth Implants in the Esthetic Zone: A Randomized Clinical Trial

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141931/1/jper1747.pd

Margin Rules, Informed Trading in Derivatives, and Price Dynamics

We analyze the impact of option trading and margin rules on the behavior of informed traders and on the micro structure of stock and option markets. In the absence of binding margin requirements, the introduction of an options market causes informed traders to exhibit a relative trading bias towards the stock because of its greater information sensitivity. In turn, this widens the stock's bid-ask spread. But when informed traders are subject to margin requirements, their bias towards the stock is enhanced or mitigated depending on the leverage provided by the option relative to the stock, leading to wider or narrower stock bid-ask spreads. The introduction of option trading, with or without margin requirements, unambiguously improves the informational efficiency of stock prices. Margin rules improve market efficiency when stock and option margins are sufficiently large or small but not when they are of moderate size

Foreign Body Embedded in the Schneiderian Membrane

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141470/1/cap0135.pd