The S&P 500 (.SPX) ended a languid session slightly in the red on Monday, with investors standing by on news of a global minimum corporate tax rate, lingering inflation fears, and a lack of market-moving economic news. The Dow (.DJI) closed well within negative territory, while the Nasdaq (.IXIC) advanced. Still, the S&P and the Dow remained inside one percentage point of their record closing highs. "Thematically, we"re done with earnings, so you have this lull in between earnings when what drives the market is economic data points," said Joseph Sroka, chief investment officer at NovaPoint in Atlanta. "There"s not a lot of impetus for investors to take action today." "There"s been this flip-flop between whether inflation will be transitory or persistent, and the next card that gets flipped over for that is the CPI report on Thursday," Sroka added. Smallcaps (.RUT) outperformed as the ongoing retail frenzy boosted stocks whose recent explosive trading volumes have been attributed to social media buzz. AMC Entertainment Holdings (AMC.N) jumped 14.8%, extending the previous week"s 85% gain. read more Other so-called "meme stocks," including GameStop Corp (GME.N) and U.S.-listed shares of Blackberry Ltd advanced between 7% and 14%. "You"ve seen a decades-long, technology-enabled democratization of the market and there"s certainly groups of individual investors that flock to these ideas," Sroka said. "We"re seeing speculative trading in an age of multiple outlets and social media amplifies the news." The Group of Seven (G7) advanced economies agreed on Saturday to back a minimum global corporate tax rate of at least 15%, a move Treasury Secretary Janet Yellen called a "significant, unprecedented commitment" to bring what she called a race to the bottom on global taxation. read moreLawmakers in Washington are doubling down on efforts to craft a bipartisan infrastructure spending package, with House Democrats expected to bring a bill to vote as early as Wednesday. read more The Dow Jones Industrial Average (.DJI) fell 126.15 points, or 0.36%, to 34,630.24; the S&P 500 (.SPX) lost 3.37 points, or 0.08%, at 4,226.52; and the Nasdaq Composite (.IXIC) added 67.23 points, or 0.49%, at 13,881.72. Of the 11 major sectors in the S&P 500, seven lost ground, with materials (.SPLRCM) suffering the largest percentage drop. Real estate (.SPLRCR) led the gainers. Shares of Biogen Inc (BIIB.O) surged 38.3% following news that the Food and Drug Administration approved its Alzheimer"s disease drug aducanumab. read more Data center operator QTS Realty Trust (QTS.N) jumped 21.2% on reports of a takeover deal by investment firm Blackstone Group (BX.N) worth $6.7 billion. {nL3N2NP2QW] Cruise operator Royal Caribbean (RCL.N) announced that six of its ships would begin sailing from Florida and Texas ports in July and August. Its shares gained 0.4%, while rivals Carnival (CCL.N) and Norwegian Cruise Line (NCLH.N) advanced 1.1% and 3.1%, respectively. Advancing issues outnumbered decliners on the NYSE by a 1.35-to-1 ratio; on Nasdaq, a 1.82-to-1 ratio favored advancers. The S&P 500 posted 62 new 52-week highs and one new low; the Nasdaq Composite recorded 168 new highs and 21 new lows. Volume on U.S. exchanges was 10.52 billion shares, compared with the 10.71 billion average over the last 20 trading days.