But if you sold one year later for less then you paid, you wouldn't have made a 138% profit, that's how I see it...
Yes, you would - 138% of your initial investment:
0.00168724 * 52 = 0.08773648
0.08773648 / 0.06325322 = 1.3871 = 138.71%
Edit: I see your point, you are talking 138% profit 'over' your initial investment. What I did show you is a 38% profit 'over' initial investment.
But 'annual yield' is just dividends received expressed as a percentage based on the investment.