The Philadelphia Semiconductor Index (SOX) has dropped more than 19% from its June 22 high, while Japanese memory maker Kioxia has seen its market value cut in half from its June peak. After the AI-driven rally that began in 2025, the global semiconductor sector is now going through one of its sharpest corrections.
SOX retreats from record high as memory and optical names fall hard
SOX climbed to an all-time high of 14,638 in late June 2026, then reversed quickly. It last closed at 11,867.50, leaving the index down about 19% from the top and raising questions about whether a topping pattern is forming.
The decline has been broad across semiconductor segments. In memory, Micron (MU) is down 32.15% from its peak, Sandisk (SNDK) has fallen 40.11%, Samsung Electronics is off 31.95%, and SK hynix has dropped 38.55%. Kioxia has been hit even harder, falling by half from its high and ranking among the steepest recent decliners.
Optical communications stocks have also sold off. Lumentum (LITE) is down 35.12% from its peak, Coherent (COHR) has lost 36.9%, and Applied Optoelectronics (AAOI) has fallen 57%.
Serenity says fundamentals have not broken down
X analyst Serenity said Micron recently announced a long-term memory supply agreement, or LTA, with Qualcomm (QCOM). Such agreements are usually taken as a positive sign for demand visibility. Even so, Micron shares fell 5% after the announcement.
His reading was that the problem does not appear to be in the AI semiconductor group itself. Instead, he said, the move looks more like deleveraging or the tail end of a margin-cascade liquidation.
He also pointed to what he described, in a sarcastic way, as a bottoming signal: when Reddit users start posting their loss screenshots at scale, panic may be nearing an extreme and the market may not be far from a bottom.
50-day EMA becomes the line to watch ahead of Mag7 earnings
Trader 3X Long Labubu focused on the 50-day exponential moving average as the most important technical marker. He said SOX is now trading around levels that match two notable lows from June 9 and July 7, giving the area technical support value.
He said he would give the market one to two trading days to try to reclaim the 50-day EMA. If that does not happen within that window, he plans to stop out of all non-Mag7 positions and hold cash while waiting for lower entry levels.
In his view, semiconductor stocks are likely to stay range-bound before the Magnificent Seven earnings reports. The main fight in the market, he said, is over the size of AI capital expenditure and how long it will take for returns on investment to show up. He also said he intends to take profit on call options and 2x leveraged ETFs to cut exposure further.
Gavin Baker and bubble boi remain constructive
Hedge fund manager and early Nvidia investor Gavin Baker said the risk-reward profile has become attractive again. He said there are many stocks trading at low valuations despite having durable competitive advantages, and those names could outperform expectations over the next six to 12 earnings seasons.
Market commentator bubble boi also kept a bullish stance. He said the current correction looks more like a setup for the next advance than the end of the move, and added that August could mark the start of a new leg higher if the AI capex cycle continues to accelerate.
Direction still hinges on clearer near-term signals
Based on the views collected in the report, the recent drop in SOX looks closer to a technical correction driven by forced unwinds of leveraged positions than to a fundamental reversal in AI demand or the semiconductor cycle. The article noted that long-term supply agreements are still being signed and capex plans have not been reduced, which points to intact demand structure for now.
Even so, the next directional signal may depend on whether SOX can hold current support and what the Mag7 earnings reports say about AI spending.
The original article also stated that it does not constitute investment advice.