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Bitcoin Spot ETFs Experience Significant Net Inflows and Outflows

According to PANews, data from SoSoValue indicates that on May 15 (Eastern Time), Bitcoin spot ETFs saw a total net inflow of $115 million. The Blackrock ETF IBIT recorded the highest single-day net inflow of $410 million, bringing its historical total net inflow to $45.423 billion. Conversely, the Ark Invest and 21Shares ETF ARKB experienced the largest single-day net outflow of $132 million, with its historical total net inflow standing at $2.567 billion. As of the time of reporting, the total net asset value of Bitcoin spot ETFs is $121.469 billion, with an ETF net asset ratio of 5.91% compared to Bitcoin's total market value. The cumulative historical net inflow has reached $41.514 billion.
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Friday Trading Costs Surge Amid Market Volatility

According to BlockBeats, Barclays Plc analysis indicates that the demand for portfolio adjustments on Fridays significantly increases the cost of trading high-grade corporate bonds by 31% compared to other days. Impax's Trzcinka noted increased market activity on Fridays, highlighting uncertainty about weekend developments. Historically, Fridays were the cheapest day for bond trading, but this trend has reversed. Barclays analysts Zornitsa Todorova and Andrea Diaz Lafuente reported that in March and April, investment-grade corporate bond trading on Fridays accounted for 18% of weekly volume, up from 16% in 2023 and 2024. Since U.S. President Donald Trump resumed office, market activity has seen broader fluctuations due to his unpredictable policy decisions on tariffs, immigration, and foreign affairs, contributing to the heightened Friday trading pace. Bloomberg Intelligence analyst Athanasios Psarofagis found that the average weekly stock market trading volume in 2025 increased by 37% compared to the previous four years, with Friday trading volume surging by 42%. Last weekend, the reasons for this growth became apparent as Trump and his Treasury Secretary released successive trade-related announcements, leading to significant market changes by Monday. The S&P 500 index rose by 3.3%, the Nasdaq 100 returned to a bull market, and credit markets showed a sharp decline in investor default concerns. Mark Clegg, a senior fixed-income trader at Milwaukee's Allspring Global Investments, emphasized the importance of reducing portfolio risk before the weekend, stating, "No one wants to enter the market on Monday morning trying to correct mistakes after significant changes." Despite increased trading speed and volume, transaction costs remain high, particularly for asset management firms. Cantor Fitzgerald asset management portfolio manager David Schiffman remarked, "Portfolio managers are forced to sell what they can, not what they want. There's a daily lack of direction and certainty, nearing the most extreme levels I've seen in my career."
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Deepfake Scams Target U.S. Officials and Crypto Founders

According to Cointelegraph, hackers utilizing deepfake technology are targeting U.S. federal and state officials by impersonating senior government figures in a sophisticated phishing campaign aimed at stealing sensitive data. The FBI issued a warning on May 15, highlighting that these cybercriminals have been active since April, employing deepfake voice and text messages to deceive victims. The agency cautioned against assuming the authenticity of messages purportedly from senior U.S. officials, as compromised accounts could lead to further targeting of government personnel and their contacts using trusted information obtained through these scams. The FBI detailed that the hackers are attempting to access victims' accounts by directing them to malicious links and hacker-controlled platforms designed to harvest sensitive data such as passwords. Additionally, contact information acquired through social engineering tactics could be exploited to impersonate individuals and solicit information or funds. In a separate incident, Sandeep Nailwal, co-founder of the blockchain platform Polygon, reported on May 13 that he was targeted in a deepfake scam. Nailwal expressed concern over the attack vector, noting that several individuals contacted him via Telegram, questioning whether he was on a Zoom call and requesting them to install a script. Nailwal explained that the scammers hacked the Telegram account of Polygon's ventures lead, Shreyansh, and invited people to a Zoom call featuring deepfakes of Nailwal, Shreyansh, and another person. The audio was disabled, prompting the scammer to request the installation of an SDK, which Nailwal warned would compromise the victim's security. He also highlighted the lack of a mechanism to report such incidents to Telegram, suggesting the need for a social method to flag suspicious accounts. Responses to Nailwal's post included reports from other users who had been targeted, including Web3 OG Dovey Wan, who shared her experience of being deepfaked in a similar scam. To mitigate the risk of falling victim to these scams, Nailwal advises against installing anything during online interactions initiated by others and recommends using a separate device for accessing crypto wallets. The FBI also emphasizes verifying the identity of anyone who contacts you, scrutinizing sender addresses for errors, and checking images and videos for unrealistic features. The agency further advises against sharing sensitive information with unknown individuals, clicking on links from unfamiliar sources, and advocates for the use of two-factor or multifactor authentication to enhance security.
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