一般來說，夏天是股市平淡到讓人昏昏欲睡的季節。天氣炎熱時投資者喜歡出外度假，成交量大幅下降，上市公司戰戰兢兢不敢發布重大消息，都要熬到秋天。現成的例子就是iPhone，總要等到9月才發布新款。

或許跟拼命工作的硅谷公司一樣，科技股夏天也不休息。很多科技股還是不斷波動，原因有些是二季報，有時則因為其他新聞。以下是2018年陣亡將士紀念日（通常為5月最后一個星期一）到勞動節（9月第一個星期一）之間漲跌幅度最大的股票。

蘋果市值達到1萬億美元

蘋果創下美股歷史，成為第一只市值達到1萬億美元的股票。蘋果創記錄的日子是8月2日。

全球市場上，第一個市值達到萬億美元的是中石油，2008年上市首日曾短暫觸及，后來十年里較最高點市值跌去約80%。

蘋果跟中石油不一樣，達到1萬億美元市值后還繼續攀升。在蒂姆·庫克帶領下，蘋果股價較達到萬億美元時又漲了10%，周五收盤時市值達1.099萬億美元。有關蘋果每年9月新品發布會的流言稱，9月12日會發布新款iPhone。蘋果發布會以前極其神秘，近年卻毫無秘密可言。

陣亡將士紀念日周末到勞動節周末期間，蘋果股價上漲了22%。相比之下，標普500指數漲幅為7%。

亞馬遜也沒落后多少

上周亞馬遜股價突破每股2000美元，周五收盤價為2012.71美元，創下歷史新高。對關注股市大事的人來說，更重要的一點是亞馬遜市值已達9820億美元，只差180億美元即可突破萬億美元大關（美國當地時間9月4日晚，亞馬遜市值已達到1萬億美元——譯注）。

當然了，主要原因是杰夫·貝索斯創立的亞馬遜二季度業績強勢，總收入上升39%，亞馬遜Prime會員人數達到新高，云計算和在線廣告業務分別增長49%和132%。如果本季度亞馬遜能保持增速，加入市值萬億美元俱樂部簡直輕而易舉。

今年夏天亞馬遜股價累積上漲了24%。

特斯拉大起大落

特斯拉首席執行官埃隆·馬斯克在Twitter上口無遮攔，特斯拉股價也跟著上躥下跳。支持特斯拉的多方與心存懷疑的空方就股價展開激烈交鋒。不過今年夏天，馬斯克確實向批評者提供了太多攻擊自己的彈藥。

總體來看，今年夏天特斯拉股價漲了6%，這段時間特斯拉正好需要證明能實現低成本的Model 3交付目標。原本特斯拉內部目標基本是顯示Model 3的生產計劃能實現，然而馬斯克在業績發布會上罵分析師，一位潛水員拯救被困山洞的泰國少年足球隊，馬斯克卻稱他“那小子”，引起諸多爭議，讓內部四處滅火焦頭爛額。

或許爭議更大的一點是，馬斯克還在Twitter上宣布籌到資金將特斯拉私有化。結果他所謂的資金根本沒到位。近日馬斯克宣布放棄私有化計劃，導致臨近夏季末特斯拉股價大跌。

這個夏天Facebook股票很不順

今夏Facebook股價下跌超過8%。最影響股價的是二季度業績，財報顯示主站活躍用戶增速放緩，而且警告稱未來趨勢可能延續。

此前數月Facebook出現大規模信息泄露事件，且處理虛假信息不力，各界質疑之聲不斷，Facebook披露信息經常不情不愿，如今財報又令人失望。馬克·扎克伯格還因Facebook干涉2016年總統大選接受國會質詢，對此Facebook一直堅稱在努力改正。（財富中文網)

譯者：Charlie

審校：夏林

Summer is, by conventional wisdom, a traditionally sleepy time for the stock market. Investors schedule their vacations during the warm months, and volume declines enough that companies hold off until the fall on releasing big announcements. Like, say, a new version of the iPhone, which is coming in September.

Perhaps its a reflection of the work-hard ethic at Silicon Valley companies, but tech stocks didn’t seem to take the summer off. Many tech shares remained volatile, driven by second-quarter earnings or other news. Here is a recap of who won and who lost between Memorial Day and Labor Day 2018.

Apple Is Worth $1 Trillion

Apple made history in the U.S. stock market by becoming the first American-based company to ever earn a market cap of $1 trillion. Apple reached that milestone on Aug. 2.

The first company to ever be worth $1 trillion was Petrochina, which reached the valuation briefly on its first day of trading in 2008, before losing about 80% of its peak value during the following decade.

Unlike Petrochina, Apple has continued to rise after it hit the $1 trillion target. Under Tim Cook’s management, Apple’s shares have since risen another 10% since breaching the $1 trillion watermark, closing Friday with a $1.099 trillion market value. Rumors concerning Apple’s annual September product event, at once among the best- and worst-kept secrets in tech, suggest that the company will unveil new iPhones on Sept. 12.

Apple’s stock rose 22% between Memorial Day weekend and Labor Day weekend. The S&P 500 Index, by comparison, rose 7%.

… And Amazon Is Not Far Behind

Amazon broke above the $2,000 per share barrier for the first time ever this week and finished the week at $2,012.71, its highest ever close. More important to those who follow stock-market milestones, Amazon is now worth $982 billion, just $18 billion shy of that fabled $1 trillion market cap.

Amazon, of course, had a strong second quarter, with overall revenue rising 39%, with more Amazon Prime members than ever, and with segments like cloud computing and online advertising rising 49% and 132%, respectively. If the company founded by Jeff Bezos maintains that growth in the current quarter, it could easily join the 13-digit valuation club.

Amazon’s stock rose 24% during the summer session.

Tesla Was as Volatile as Ever

Thanks to the compulsive tweeting by Tesla CEO Elon Musk, shares of Tesla were as volatile as they’ve ever been. Tesla’s bullish supporters and its bearish skeptics have been waging a war over the direction of the company’s stock price. But this summer, Musk gave his critics more than enough ammunition against him.

Overall, Tesla shares rose 6% during the summer, a period when Tesla needed to prove its ability to deliver on its audacious production goals for making its lower-cost Model 3 cars. While Tesla’s internal metrics seemed to show that production of Model 3s are meeting goals, Musk distracted from that goal by berating analysts in an earnings call and infamously calling a diver who rescued a Thai soccer team a “pedo.”

Perhaps most controversially, Musk tweeted that he had secured financing to take Tesla private. Whatever financing he was thinking of didn’t pan out. Musk this week abandoned his plans to take Tesla private, causing the stock to slump at summer’s end.

Facebook’s Stock Is Having a Bad Summer

Shares of Facebook have fallen more than 8% between Memorial Day and Labor Day. The biggest drag on its share price was the company’s second-quarter earnings, in which the company suffered a slowdown in the growth of active users on its core site and warned that the trend may continue into the future.

Those disappointing metrics followed months of questions and often reluctant disclosures about massive information leaks and about how it handles false information on its site. Facebook keeps saying it’s doing its best to counter the kinds of missteps that placed Mark Zuckerberg in the middle of a Congressional inquiry into Russian meddling in the 2016 presidential election.