Twitter (TWTR) reached over $20 and no surprise an analyst downgraded the stock. According to The Fly, Evercore ISI analyst Ken Sena downgraded Twitter and lowered the price target to $17 from $18. Clearly, the analyst didn't see any vast change in the business landscape to only lower the price target my a meaningless dollar. The odd part is how the opinion on the valuation was hardly altered, but the statements regarding competing broadcasting capabilities was more negative. As usual, take the information provided by any analyst into an investment thesis, but don't alter your investment thesis based solely on what an analyst says in a research report. The dip provides another opportunity to own Twitter as the NFL season kicks off and other live-streaming events should provide momentum for the stock. Twitter is now trading below $19 providing a nice 6% dip. Disclosure: Long TWTR