Top Wall Street analysts changed their outlook on these top names. For a complete view of all analyst rating changes, including upgrades and downgrades, please see our analyst ratings page. Piper Sandler boosted Duolingo, Inc. (NASDAQ:DUOL) price target from $271 to $351. Piper Sandler analyst Arvind Ramnani maintained an Overweight rating. Duolingo shares closed at $318.85 on Wednesday. See how other analysts view this stock.B of A Securities cut the price target for Bloom Energy Corporation (NYSE:BE) from $8 to $7. B of A Securities analyst Julien Dumoulin-Smith maintained an Underperform ra…