Wall Street did something strange with Micron Technology (MU) on May 18.

Three major firms turned more bullish on the same morning the stock fell almost 6%. That kind of split between the tape and the research desk does not happen often, and it deserves a closer look.

Melius Research raised its price target on Micron from $700 to $1,100. HSBC moved to $1,100 from $750 on the same day. Citigroup separately raised its target from $425 to $840, according to MarketBeat.

The stock, meanwhile, closed at $681.54, down 5.95% on the session, TradingKey reports.

Two questions matter for investors right now: what made three firms so bullish at the exact moment the market sold the stock, and whether the $1 trillion market cap thesis…