Typically there is the Jan effect where stocks does well the first month historically. ^^^
I see a lot of people losing money right now because they aren't assessing risk as well as they should, meaning scaling in and out of stocks as it hits specific price targets, setting tight stops, etc. You have to understand your own risk tolerance and have a solid plan in place, not just relying on something going up or down, learn some technicals, patterns, paying attention to wider market moves, and most importantly, price movement.
On another note, PFE with another great day despite the market, that's called relative strength.