Well, as I said, that's what it *should* be, but in practice I'm (at least) getting roughly half that return. The displayed stock prices simply aren't correct.
Tier 1:
Line above middle is actually 15.50, not 16.
Middle line is (correctly) 15.00
Line below middle line is 14.55, (and I was right on it)
And, just to see if it some weird exponential graph:
1/2 way between line below middle line and line below that (albeit slightly closer to bottom of the two: 14.28. So no, not exponential.
So, not exponential, just flat out wrong. The bottom edge is really ~13.5, topmost 16.5, with each line being a 0.5 increment.