Investors appear to be having second thoughts about this high-flying tech stock.Super Micro Computer (SMCI 8.60%) has been a hot buy this year, but lately, the stock has been nosediving. In just six months, it has fallen by 27%. Its year-to-date return is still impressive at 90%, but it's clear that investors appear to be growing concerned with the stock potentially hitting a peak.The company, also known as Supermicro, experienced a lot of growth due to artificial intelligence (AI) as businesses upgrade the ...