Chad Langager is a co-founder of Second Summit Ventures. He started as an intern at Investopedia.com, eventually leaving for the startup scene. Vikki Velasquez is a researcher and writer who has ...

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 ...

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 ...