CPI Didn’t Break the Market. LITE Jumped 13% — Is AI Infrastructure Rotating Into Storage?
CPI came in roughly in line with expectations, so macro pressure did not get worse.
But I think the more important signal today was the tape:
$Lumentum(LITE)$ gained more than 13%, $SanDisk Corp.(SNDK)$ rose over 8%, and MU added more than 6%.
Optical and storage moved together again.
💡 The Setup: The Biggest Macro Risk Didn’t Hit
July CPI was 3.4% YoY, while core CPI came in at 2.5%.
That is not a huge bullish surprise.
But inflation also did not reaccelerate, which matters after weeks of concern around oil, inflation and another round of Fed tightening.
For high-multiple AI names, simply avoiding another macro shock was enough to help.
🚀 LITE: This Earnings Report Was Legit
Lumentum posted quarterly revenue of about $1.006B, up 109% YoY.
More importantly:
Non-GAAP gross margin reached 50.4%, while operating margin hit 36.6%.
Its next-quarter revenue guidance midpoint also moved to roughly $1.25B.
At this point, this is no longer just a story about future AI optical demand.
Orders are becoming revenue, and revenue is becoming real profit.
🔌 AAOI: The Risk Is More About Capacity Than Demand
AAOI is a slightly different setup.
Q2 revenue reached about $191.9M, up 86% YoY, while Q3 guidance came in at $255M–$290M.
800G is ramping quickly, and 1.6T is starting to contribute.
So I am less worried about whether demand exists.
The bigger questions are:
Can capacity ramp fast enough, and when will margins catch up?
That is why AAOI may still have more operating leverage, while LITE currently offers better earnings quality.
📊 Side by Side: Two Different Optical Stories
The easiest way to frame it:
LITE = profitability is already showing up.
AAOI = capacity is still catching up with demand.
One has more earnings visibility.
The other has more execution-driven upside.
But both are telling the market the same thing:
The 800G-to-1.6T upgrade cycle is still alive.
🌐 Why I’m Still Bullish on Optical
The obvious risk now is valuation.
Optical names have already run hard.
But fundamentally, I still do not see a clear peak.
1.6T is ramping, while ELS, NPO and CPO are coming behind it. Optical connectivity is also moving closer to the GPU and deeper inside the rack.
So my view has not changed much:
I would not chase LITE or AAOI after vertical moves, but I would still rather buy a normal pullback than assume the cycle is over.
💾 The Ripple Effect: Storage Is Starting to Join
The more interesting part today was that storage moved too.
SNDK gained more than 8%, while MU rose more than 6%.
That suggests investors are not only buying one strong optical earnings report.
Money is also rotating back into parts of AI infrastructure that had been hit harder.
Storage is clearly one of them.
🧠 SNDK: Tomorrow Is the Real Test
SNDK and Kioxia also unveiled a new 2Tb QLC NAND product aimed directly at AI and data-intensive workloads.
I would not overhype that announcement by itself.
The more important catalyst is tomorrow’s Investor Day.
The market wants to know whether SNDK can move beyond being viewed as just a NAND pricing-cycle stock.
The real questions are around:
Enterprise SSD, QLC, HBF and how much of AI storage demand can actually become durable earnings.
🎯 Why This Matters: Optical Has Proven It. Storage Still Has To
The two sectors are in different stages.
Optical: AAOI and LITE have already validated demand through earnings.
Storage: pricing and earnings are strong, but investors are still worried about a future cycle peak.
That is why I currently see it this way:
Optical has the stronger fundamental proof. Storage may have the better rerating upside.
🧠 Final Thoughts
CPI was just the backdrop today.
What matters more to me is what the companies themselves are showing.
LITE is proving margin expansion. AAOI is proving demand and capacity growth.
If SNDK can use Investor Day to make the AI-storage story more convincing, then this rotation may not stop with optical.
The next things I am watching are simple:
Can LITE hold the earnings gap? Can AAOI keep executing on 1.6T? And can SNDK finally re-rate from a “NAND cycle stock” into an “AI storage stock”?
Disclaimer: Investing carries risk. This is not financial advice. The above content should not be regarded as an offer, recommendation, or solicitation on acquiring or disposing of any financial products, any associated discussions, comments, or posts by author or other users should not be considered as such either. It is solely for general information purpose only, which does not consider your own investment objectives, financial situations or needs. TTM assumes no responsibility or warranty for the accuracy and completeness of the information, investors should do their own research and may seek professional advice before investing.
