NEW YORK (Reuters) – U.S. existing home sales fell for a fifth straight month in June to the lowest level in two years, as fast-rising interest rates and record-high selling prices make buying a home too expensive for a growing share of American households. Mortgage interest rates have soared as a result of the Federal Reserve’s stiff rate hikes to try to tame high inflation. That has driven a new buyer’s monthly payment up by more than 50% in the first six months of 2022 by some estimates and has had a clear effect on home sales that had surged during the COVID-19 pandemic to the highest leve…