BlockBeats News, May 18th, all three major US stock indexes fell, with Micron Technology (MU.O) dropping nearly 3% after briefly rising over 4%, SanDisk (SNDK.O) falling nearly 6%, and NVIDIA (NVDA.O) dropping over 1% after previously rising over 2%.

On the news front, Iran stated that there are still substantive differences between the two sides, while US officials said Iran's latest proposal is not sufficient to reach an agreement.