This week, which stocks lagged or dragged? Weekly Winners column keeps up with market trends, helping Tigers sort out the week's hottest sectors, stock winners and important news.

Below are top 10 S&P 500 stock gainers for the week ended March 20:

Ciena Stock Is at Its Highest Since the Dot-Com Bubble

After decades of stagnant returns, optical-networking company Ciena shares have morphed from a cautionary tale into one of Wall Street’s hottest stocks. The stock has soared nearly 450% over the past 12 months. It’s all on the back of the artificial-intelligence boom that has boosted demand for networking technology within and between data centers

Ciena shares jumped 13.8% to a new high this week.

Last week, Quantum Computing and Ciena demonstrated a quantum-secured communications architecture combining QKD, post-quantum cryptography, and high-speed optical encryption at OFC 2026.

Apache, Baker Hughes, Halliburton Jump as Crude Oil Jumps on Renewed Middle East Supply Fears

Oil and gas companies jumped this week. The price of oil and natural gas jumped as escalating attacks in the Persian Gulf caused long-term damage to major energy facilities.

Apache, a company exploring, developing, and producing oil and gas properties – hit a 8-day winning streak. The shares jumped 13.5% this week.

Meanwhile, Baker Hughes gained 11.2% this week, while Halliburton rose 8.4%.

Delta Air Jumps After It Raises Revenue Expectations

Delta Air said on Tuesday it expects first-quarter profit within its initial forecast range but raised its revenue expectations on strong demand, ​amid high jet fuel prices due to the conflict in the Middle ‌East.

Rising jet fuel prices, up more than 50% since U.S. and Israeli strikes on Iran in late February, have cast a shadow ahead of the upcoming summer travel season that is expected ​to pave the way for a recovery for U.S. carriers.

Delta said consumer ​and corporate demand trends have improved into March with strength across ⁠its main, premium and loyalty revenues.

Shares of the carrier rose 7.9% this week.

Some Chip Stocks Jump This Week

Some chip stocks jumped this week.

Western Digital and Lam Research rose 7.6%; SanDisk rose 7.3%; Seagate Technology rose 7.2%.