WalmartWMT.N shares sank 8.1% a day after touching a record high. By Sinéad Carew and Shristi Achar A Nov 16 (Reuters) - The S&P 500 and the Nasdaq managed to eke out tiny gains on Thursday while the Dow Industrial Average .DJI ended slightly lower with pressure from tech and retail bellwethers Cisco and Walmart after disappointing forecasts. Earlier this week, Wall Street indexes had rallied sharply with data signaling cooling U.S. inflation and fueling hopes the U.S. Federal Reserve is done hiking interest rates.