Target Corp TGT.N fell 2.2% in trading before the bell after reporting a 90% fall in quarterly earnings and missing comparable sales estimates as its inflation-hit customers reined in spending on discretionary goods. US/ Stronger-than-expected corporate earnings have helped fuel a rebound for U.S. stocks, but some investors are pointing to potential risks ahead for profits that could sap momentum. Home improvement chain Lowe's Cos Inc LOW.N rose 2.9% on posting a better-than-expected quarterly profit.