Catch up on today's top five analyst initiations with this list compiled by The Fly: 1. Advance Auto Parts (AAP) initiated with an Underweight at Barclays by analyst Matthew McClintock, who said years of underinvestment will likely to push out the company's turnaround. 2. Expedia (EXPE) initiated with a Sector Weight at Pacific Crest with analyst Brad Erickson saying the stock has little opportunity for multiple expansion over the medium term given acquisition integrations and deceleration in key metrics. 3. Priceline (PCLN) initiated with a Sector Weight at Pacific Crest by analyst Brad Erickson, who said he would look for a pullback before getting more constructive on the name. 4. Spark Therapeutics (ONCE) initiated with an Underperform at Wedbush with analyst David Nierengarten saying the stock is overvalued given the risks associated with Spark's market opportunities for its gene therapy programs, including SPK-RPE65 for RPE65-related inherited retinal dystrophies, and early stage programs for choroideremia and hemophilia B. 5. Sabre (SABR) initiated with an Overweight at Pacific Crest citing the company's "underappreciated beneficiary" of the digital democratization of travel. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.