---
title: "Weekly Recap | SPDR S&P Biotech +5.29%, AI and cancer vaccine catalysts fire up rally"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/296673151.md"
description: "SPDR S&P Biotech (XBI) surged 5.29% this week to close at $165.73, decisively outperforming the S&P 500, which fell 1.43%. That’s a relative outperformance of roughly 6.72 percentage points. The fund staged a sharp rally through Monday to Wednesday, hitting an intraweek high of $169.68 on Wednesday before a pullback on Thursday and a modest recovery on Friday. Average daily volume reached 10.4 million shares, about 27."
datetime: "2026-08-22T06:32:02.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/296673151.md)
  - [en](https://longbridge.com/en/news/296673151.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/296673151.md)
generator: "portal-rs"
---

# Weekly Recap | SPDR S&P Biotech +5.29%, AI and cancer vaccine catalysts fire up rally

## The Week

SPDR S&P Biotech (XBI) surged 5.29% this week to close at $165.73, decisively outperforming the S&P 500, which fell 1.43%. That’s a relative outperformance of roughly 6.72 percentage points. The fund staged a sharp rally through Monday to Wednesday, hitting an intraweek high of $169.68 on Wednesday before a pullback on Thursday and a modest recovery on Friday. Average daily volume reached 10.4 million shares, about 27.5% above the 60-day median, signalling broad-based participation in the move.

## Sector News

It was a week defined by AI and cancer breakthroughs in biotech. Twist Bioscience rocketed over 20% in a single session after being selected by Anthropic as an independent evaluator for AI-designed proteins. Moderna’s stock exploded 177% in one day on positive trial results for its personalised cancer vaccine. Several biotech names, including Iovance Biotherapeutics and Revolution Medicines, hit 52-week highs.

On the macro side, Schroders flagged an extreme valuation discount in the healthcare sector, pointing to ageing populations as a structural tailwind for attractive entry points. Meanwhile, Guotai Asset Management highlighted liquidity-driven repricing potential in China’s innovative drug space.

## The Week Ahead

Tuesday (25 August) brings a batch of US housing data—FHFA and Case-Shiller home price indices, plus new home sales—alongside the Conference Board consumer confidence reading. These macro releases could shift the broader risk appetite backdrop. For biotech, the focus will be on whether the AI and cancer-vaccine catalysts can sustain follow-through momentum after this week’s sharp moves.

## In Short

XBI delivered a strong rally powered by AI and oncology catalysts, leaving the broad market well behind. Volume surged, but the tape also showed signs of internal tension: while clinical breakthroughs and AI partnerships drove upside, some insiders took profits—Twist Bioscience’s president sold over $9 million in shares, and the latest session’s large-lot flow turned net seller. The path ahead hangs on whether the catalysts have staying power and how macro data shapes risk appetite.

*This article is generated by LongbridgeAI from market data, for information only and not investment advice.*

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- [XBI.US](https://longbridge.com/en/quote/XBI.US.md)

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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**