What are the matters to be considered while studying market write in brief

Answer.
Global economics, laws and bills in the country and international treaties, merger or acquisition talks surrounding a company, new product releases, innovations, health of owners and important people in companies, pending lawsuits or legal troubles, and new opportunities worldwide. I doubt I could list everything here. I can say I invest in pharmaceutical and biotech companies almost exclusively. I do this by following FDA trial phases (3 phases) and determining if the drug in question has a good chance of being approved. Each phase will get approved or rejected and this will usually dictate at least a small boost or decline in stock prices. Approval for human trials and a following success (approval for market release) would usually yield the highest jump in stock prices. This will be small for a pharma giant like Pfizer and huge for Arena pharnaceuticals who released the first weight loss drug in 13 years a while back. Their stock jumped from $1.25 up to a peak around $17. I bought in at $2.15 and sold at $13.50 a share. It was my biggest stock market win. You can also look to buy very low if a company absorbs the losses from a death in trials or after release but has the money or funding to continue their efforts. This will put them in penny stock territory and with some decent work and a few breakthroughs, they will balloon quickly and close to their original value due to a knowledge of what they can be.