Shares of American Tower Corp AMT.N, one of Mowrey's holdings, are up 17% for the year. By David Randall NEW YORK, June 4 (Reuters) - Investors will watch Washington in the coming week for clues on whether an outsized rally in shares of companies that would benefit from President Joe Biden's proposed $1.7 trillion infrastructure plan has more room to run. Investors have embraced infrastructure stocks at a time when concerns about rising inflation, lingering disruptions in global supply chains from the coronavirus pandemic and accommodative central bank policies have helped push prices for raw materials to multi-year highs.