US STOCKS-S&P, Dow hold on to record highs, Nasdaq dips By: Reuters: Company News September 21, 2018 at 13:41 PM EDT * Indexes: Dow up 0.29 pct, S&P up 0.13 pct; Nasdaq off 0.16 pct (Adds comments, updates to early afternoon) Read More >> Related Stocks: AT&T Inc Alphabet-A Amazon.com Apple CenturyLink Facebook McDonald's Corp Micron Technology Twitter, Inc. Verizon Communications