W - Hot Stocks: E-commerce slide; PLAN Y takeover deals; NLSN rejects bid; IMGN drops on clinical data

Following sharp gains throughout most of last week, investors took a more cautious stance on Monday, sending the major averages modestly lower. E-commerce stocks epitomized the recent trading activity, losing ground during the session after substantial gains in the previous few sessions. Shopify (SHOP) led the e-commerce retreat, posting a double-digit percentage loss. Chewy (CHWY), Wayfair (W) and Etsy (ETSY) all lost ground as well. Elsewhere in the market, M&A activity provided a major catalyst on the session. Anaplan (NYSE:PLAN) and Alleghany (NYSE:Y) both jumped after separate deals to be acquired. Meanwhile, Nielsen (NLSN) dropped after it rejected a takeover offer. In other news, ImmunoGen (IMGN) suffered a massive sell-off after revealing clinical trial data for a potential ovarian cancer drug. Sector In Focus E-commerce stocks posted notable losses on Monday, reversing some of the gains recorded over the previous few sessions. Investors took a portion of their profits after

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Hot Stocks: E-commerce slide; PLAN, Y takeover deals; NLSN rejects bid; IMGN drops on clinical data