Market Downturn: Analyzing Key Stock Declines for Zscaler, Inc. (NASDAQ: ZS), PicoCELA Inc. (NASDAQ: PCLA), and Leveraged ETFs

Font: Financial Modeling Prep  • May 27, 2026

• Massive short interest significantly impacted PicoCELA Inc. (NASDAQ: PCLA)'s stock performance.
• Leveraged ETFs, such as KraneShares 2X Long PDD Daily ETF (ARCA: KPDD), demonstrated their inherent volatility with rapid price declines.
• Even with strong operational performance or positive news, companies like Zscaler, Inc. (NASDAQ: ZS), Co-Diagnostics, Inc. (NASDAQ: CODX), and Edesa Biotech, Inc. (NASDAQ: EDSA) experienced significant stock drops, highlighting broader market pressures.

Today’s market saw major declines for several companies, including Zscaler, Inc. (NASDAQ: ZS), KraneShares 2X Long PDD Daily ETF (ARCA: KPDD), and Co-Diagnostics, Inc. (NASDAQ: CODX). The downturns appear driven by a mix of specific company news, investor sentiment, and the inherent risks of certain financial products. Each company faced unique pressures that contributed to its stock price falling.

Zscaler stock fell by $58.19, a 31.52% decrease, to $126.41 on a very high trading volume of 31.47 million shares. This significant drop occurred despite Zscaler announcing strong third-quarter results. Zscaler reported earnings and revenues that surpassed estimates, driven by high demand for its security platform.

PicoCELA Inc. (NASDAQ: PCLA) saw its stock price drop by $2.11, or 17.58%, to $9.89. A primary reason for this decline is a 29,900.8% increase in short interest in December. Short interest represents the number of shares investors are betting will fall in price, and a large increase puts significant downward pressure on a stock.

The KraneShares 2X Long PDD Daily ETF declined by $1.61, or 20.99%, to $6.06. As a leveraged ETF, this fund is designed to deliver twice the daily performance of PDD Holdings Inc. (NASDAQ: PDD). Such funds are known for rapid and large price movements, which explains the significant drop.

Other companies like Co-Diagnostics, Inc. and Edesa Biotech, Inc. (NASDAQ: EDSA) also fell. Co-Diagnostics, Inc. dropped 19.87% to $7.30 while it advances its Ebola test development. Edesa Biotech, Inc. declined 17.84% to $7.97 as it prepares to present new data on its paridiprubart drug.

In summary, the day's losses highlight diverse market forces. Declines were driven by massive short interest in PicoCELA Inc. and the high-risk nature of leveraged ETFs like KraneShares 2X Long PDD Daily ETF. For Zscaler, Inc., Co-Diagnostics, Inc., and Edesa Biotech, Inc., the drops occurred even with positive operational news, showing that good company performance does not always protect a stock's price.