Retail investors were less enthusiastic about buying the dip in U.S. stocks on Tuesday, the latest sign of a possible fatigue after last year’s tech-fueled trading frenzy, Vanda Research analysts said in a weekly note. Individual investors bought $1.6 billion in stocks on Tuesday when U.S. shares sold off sharply after weak results from Goldman Sachs and a spike in U.S. bond yields. By contrast, they had bought close to $2 billion on Sept. 28 when the S&P 500 fell 2 percent. “Retail investors bought a lot less than they typically would,” Vanda’s Ben Onatibia and Giacomo Pierantoni said about Tuesday’s session. “This could be the first sign that retail fatigue or capitulation is setting in, at least in the tech space.” Vanda’s research note comes as enthusiasm around so-called “meme stocks” also appears to be fading, a year on from the GameStop Corp frenzy when retail investors coordinated on …