Doesn't need to be any reason. It has been overbought with too low a yield for some time.
The yield is still under 3.5% which is too low, imo, so this could easily pull back quite a bit more without any particular reason. The company is performing great, but the units are still overpriced, imo.
And I suppose you know what SXL/ETP asset base are going to do with all the pipeline systems (valuation). #s game and valuation have a fine line. A chart may show whats happened, "OR WHAT MAY". I see valuation in what hasn't been utilized. A UNIT will be overpriced when all options are obviously exhausted- and I've lost count how many options there are now on the table to increase the overall VALUE. That dramatic downward is most likely your shorts looking at the yield?