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MEXC Exchange/Learn/Sarah Chen
Sarah Chen

Sarah Chen

Nationality: Australia Bio: Sarah Chen specializes in DeFi protocols, smart contracts, and Layer-2 solutions. Based in Melbourne, she brings technical expertise and clear communication to complex blockchain topics. She holds a Bachelor's degree in Computer Science from the University of Melbourne and worked as a blockchain developer for three years before transitioning to technical writing. Her hands-on experience with Ethereum, Solana, and other platforms allows her to explain intricate concepts in accessible language. Since joining MEXC Learn in 2022, Sarah has focused on making blockchain technology understandable for all users, covering topics from DeFi yield farming to zero-knowledge proofs. Areas of Expertise: - DeFi Protocols - Smart Contract Analysis - Layer-2 Solutions - Blockchain Infrastructure - Protocol Security

Recent Articles

Why Does Warren Buffett Own Occidental Petroleum? Berkshire Hathaway’s OXY Stake Explained

Why Does Warren Buffett Own Occidental Petroleum? Berkshire Hathaway’s OXY Stake Explained

Summary “Why does Warren Buffett own Occidental Petroleum?” is one of the most common questions surrounding OXY stock, but the wording needs an important 2026 clarification. The large Occidental

2026-08-14

Best OrangeX Alternatives: A 5/10 Trust Score Behind Genuinely Competitive Fees, and 6 Alternatives

Best OrangeX Alternatives: A 5/10 Trust Score Behind Genuinely Competitive Fees, and 6 Alternatives

MEXC is the strongest overall OrangeX alternative for most traders, halving the spot taker from 0.10% to 0.05%, dropping the spot maker to 0%, and pairing it with a 9/10 CoinGecko trust score against

2026-08-14

OXY vs OXYON: What’s the Difference Between Occidental Petroleum Stock and Tokenized OXY?

OXY vs OXYON: What’s the Difference Between Occidental Petroleum Stock and Tokenized OXY?

Summary OXY and OXYON both provide economic exposure related to Occidental Petroleum, but they are different financial instruments. OXY is common stock issued by Occidental Petroleum Corporation and

2026-08-14

How to Buy OXYON on MEXC: Step-by-Step Guide

How to Buy OXYON on MEXC: Step-by-Step Guide

Summary OXYON is an Ondo tokenized product designed to provide economic exposure linked to Occidental Petroleum Corporation (NYSE: OXY). MEXC launched OXYON/USDT on March 4, 2026 as an ERC-20

2026-08-14

What Is Occidental Petroleum (NYSE: OXY) Stock? Oil, Permian, Berkshire Hathaway, Debt and Carbon Strategy

What Is Occidental Petroleum (NYSE: OXY) Stock? Oil, Permian, Berkshire Hathaway, Debt and Carbon Strategy

Summary Occidental Petroleum Corporation (NYSE: OXY) is an international energy company focused primarily on oil and natural gas production, midstream and marketing activities, and lower-carbon

2026-08-14

What Is Invesco QQQ ETF? Nasdaq-100 Holdings, Strategy, Fees and Risks

What Is Invesco QQQ ETF? Nasdaq-100 Holdings, Strategy, Fees and Risks

Summary Invesco QQQ ETF (NASDAQ: QQQ) is an exchange-traded fund designed to track the Nasdaq-100 Index, which represents 100 of the largest non-financial companies listed on the Nasdaq Stock Market.

2026-08-13

What Is QQQON? Ondo Tokenized Invesco QQQ ETF Explained

What Is QQQON? Ondo Tokenized Invesco QQQ ETF Explained

Summary QQQON, styled by Ondo as QQQon, is a tokenized product designed to provide economic exposure linked to the Invesco QQQ ETF (NASDAQ: QQQ). The product structure has three important layers:

2026-08-13

Why Does QQQON Track QQQ? Tokenized ETF Premiums, Discounts and Price Differences Explained

Why Does QQQON Track QQQ? Tokenized ETF Premiums, Discounts and Price Differences Explained

Summary QQQON is designed to provide economic exposure linked to Invesco QQQ, while QQQ itself tracks the Nasdaq-100 Index. This creates a two-stage tracking structure: Nasdaq-100 Index ↓ QQQ ETF ↓

2026-08-13

QQQ Holdings 2026: Top Companies, AI Exposure and Nasdaq-100 Sector Breakdown

QQQ Holdings 2026: Top Companies, AI Exposure and Nasdaq-100 Sector Breakdown

Summary Invesco QQQ is often associated with U.S. Big Tech, but understanding QQQ holdings requires looking beyond the idea that it is simply a “technology ETF.” QQQ tracks the Nasdaq-100 Index,

2026-08-13

QQQ vs QQQM: What’s the Difference Between Invesco’s Nasdaq-100 ETFs?

QQQ vs QQQM: What’s the Difference Between Invesco’s Nasdaq-100 ETFs?

Summary QQQ and QQQM both provide exposure to the Nasdaq-100 Index. That often leads to a simple question: If both track the same index, why do both funds exist? The main differences are: Expense

2026-08-13

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