James Chen, CMT is an expert trader, investment adviser, and global market strategist. Option margin is the collateral (cash or securities) an investor must deposit before writing or selling options ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Vikki Velasquez is a researcher and writer ...

Abstract: Customer requirements are constantly evolving, which will cause high change risks and redesign costs for the products. To control the change risks toward evolving customer requirements, ...

Abstract: One of the main challenges in feature learning using Deep Convolutional Neural Networks (DCNNs) for large-scale face recognition is the design of appropriate loss functions that can enhance ...

The profit margins for jewelry makers and sellers can vary widely, particularly given the numerous categories within this industry. Fine jewelers who either make their own products or source their ...