Trend or just completely random

n748

It's simulated data. Reset every 1000 days. What do you think?
I'll let you know what model I used to create data

ranchgirl

wait

n748

Just want to say that I was surprised to see those trend based on a random process, the set up was:
1. each day there are equal chance to go up or down;
2. the step size is also a random variable with normal distribution, no bias to positive or negative.

Therefore, I expected to see a random walk around y=1, but what I got is those trend up (down). That made me wonder whether the stock market is just complete random. All those news, earnings, analyst upgrade/downgrade, etc. doesn't really matter to the whole market, even though it seems like they are the determining factors when you focus on a specific day for a specific stock.

quickcow

你中有我，我中有你。。。
反正搞不清就是了。。。