<prompt> Human: So if you look at your iPhone and it says, lets say, AAPL 1.55, does that reset every morning at 9am EST on a Monday? For example, at market closing on Friday, AAPL was -2.54. Did it gain the 2.54 and an additional 1.55 today, or is it in reference to the previous closing?  <response>: It is referenced based on previous closing.For example, AAPL closes at 100 on Friday. If the market opens at 101 on Monday, that is seen as a 1. If at market close on Monday, AAPL is at 105, then it is quoted as 5 for Monday.You can see this for yourself and calculate it out here: 