Lumentum's breakout to a record weekly close, up 15.3% and erasing five months of chop in one week, is backed by revenue growing 109% year over year rather than hype. x.com 

Owning Lumentum's laser fab could secure Marvell's FY28 supply and hedge its DSP franchise as optical links shift to CPO. The rumored deal's strategy makes sense, but short-term pain is likely: at a 30% premium, roughly $17.5B in new debt and the rest in stock, rough math puts EPS dilution near 15%. It turns accretive only if Lumentum outgrows Marvell at today's guided rates for five or six more quarters, which looks achievable while the laser shortage lasts. x.com  x.com  x.com 

Lumentum is a great business, but at $954 its risk/reward is not attractive. Applying 30x to fiscal 2028 non-GAAP EPS of $40 gives a 2027 price target of $1,200, about 26% upside, or roughly 15% after adjusting for execution, financial, technology and supply risks. Reaching it needs on-time manufacturing ramps, sustained pricing power and cash flow without excessive dilution. Lost pricing power plus slipping OCS or laser ramps would break the thesis; a significant dip would offer a better entry. … Show more

Lumentum's 49x free cash flow will look like an obvious bargain as very strong demand for its products turns into rapidly expanding free cash flow. The near-term fear that AI must pace the frontier is just a narrative. Unlike Applied Optoelectronics, which still burns meaningful cash and must raise capital from time to time, Lumentum is mature and no longer needs outside capital. The only question is how long the market takes to recognize it. x.com  x.com 

Lumentum is a $1,800 stock trading at $900. x.com 

Lumentum requires paying up heavily for a company that is not yet making money. Revenue grew 109% year over year, but it trades at about 25 times annualized sales, and it is growing less than memory makers at ten times their valuation. @ZeekTyt cites Lumentum's CEO expecting to supply only about 30% of requested laser demand as CPO and NPO ramp in 2027, with balance around 2029-30. x.com  x.com 

Lumentum's valuation is supported by Nvidia's co-packaged optics scale-out progressing faster than expected. Spectrum-X CPO switches are in mass production on better component yields, with shipments forecast at 15k in 4Q26 rising to 100k in 2027. CPO and NPO are seen contributing 12% and 26% of Lumentum's revenue in 2027 and 2028. Scale-up optical engine estimates were revised to 6.5m and 42m for 2027 and 2028, with full NPO adoption for the cycle retained. x.com 

Lumentum remains attractive as its CEO says it is completely sold out through early 2029, extending his earlier 2028 horizon despite roughly 12x growth at its main Japan factory in two years. New laser capacity takes three to five years to build, and hyperscalers are helping fund expansion through long-term commitments, pointing to persistent supply pressure. x.com 

Lumentum looks only slightly attractive, and only after another 10% drop, at about 24.5 times its guided $40 FY28 EPS at $980. Its upside is almost entirely driven by optical circuit switch demand from lead customer Google, which also points to a great 2027-2028 for fellow Google OCS supplier Huber+Suhner. Total OCS demand now exceeds the 8 million units first cited. x.com 

Lumentum's 109% year-on-year growth and sold-out capacity through 2029 make selling its AI optics exposure questionable. Bloomberg reported Marvell is in advanced talks to buy it; the appeal depends on the price, especially when holders of an $80 billion Lumentum would become holders of a $320 billion-plus Marvell growing 37%. x.com