© 2022 Cable News Network.To Warner Media Company.All Rights Reserved.CNN Sans ™ & © 2022 Cable News Network.(CNN Business) -- After months of failing to rally, Amazon shares are near a record high.Thanks to Prime Day, the annual sales bonanza that starts on Monday.What's happening: In 2020, analysts estimated that Amazon's Prime Day saw sales of $9 billion to $10.5 billion.The sales rush as the economy reopens could encourage even more spending this time around by consumers armed with excess savings.Adobe Analytics believes the expense could reach $11,000.Amazon shares have risen in six of the last nine trading sessions, and are now just 1.3% below their all-time high reached in September 2020.But there are a few reasons why Prime Day may not help the company's stock as much as one might hope.First, there is the impact of global supply chain disruptions from the pandemic.Some independent sellers interviewed by CNN Business said they can't offer their typical promotions because they worry they won't be able to keep up with customer demand.They also cannot afford to hurt profits as the cost of moving goods around the world rises."I don't have enough profit margin to do it," said Ivan Ong, co-founder of Keababies, which sells maternity and baby care products.Keababies is paying double the price for container shipping to import products from China compared to a year ago.These issues come as Amazon is trying to boost the role independent merchants play at the event, which last year included more than 1 million global discounts.Third-party sellers account for about 60% of Amazon's $236 billion in annual retail sales.Amazon shares are also under broader pressure as investors weigh signals from the Federal Reserve that it may raise interest rates sooner than expected.Low rates have been a boon for fast-growing companies like Amazon.They have helped keep government bond yields extremely low, increasing interest in riskier investments such as higher-yielding stocks.The concern: As rates rise in the coming years, investors may start to consider putting their money elsewhere.Some are already making this decision.Amazon shares are up just 7% so far this year, much more moderate than the 76% rise it posted in 2020. Apple shares are actually down 1.7% in 2021, having gained 81% last year.Some big tech names are doing better.alphabet.Google's parent, is up 37% so far this year, up from 31% last year.But it's clear that Amazon is fighting a mood swing, even if its Prime Day 2021 is a success.Amazon Prime Stocks Stock Market© 2022 Cable News Network.To Warner Media Company.All Rights Reserved.CNN Sans ™ & © 2022 Cable News Network.