This is one of the most important macro events of the month because two separate catalysts are hitting markets within about 90 minutes of each other: the June CPI release, followed by Kevin Warsh's first congressional testimony as Fed Chair. 

I would not conclude that "the Fed is turning hawkish" based on the hearing alone.

The more important question is whether both events reinforce each other:

Hot CPI + hawkish Warsh: This is the most bearish outcome. Markets could push back expectations for rate cuts, Treasury yields may rise, and long-duration assets such as AI, software and high-growth technology could face renewed selling pressure. 

Cool CPI + measured Warsh: Likely supportive for equities and could revive expectations of easing later in the year.

Mixed signals: Expect sharp intraday volatility rather than a sustained trend.

The Iran-related rise in oil prices complicates the picture because it increases the risk of energy-driven inflation, making the Fed less comfortable signalling easier policy. 

For long-term investors, this is generally not a reason to overhaul a portfolio overnight. For traders with significant exposure to rate-sensitive technology stocks, keeping some cash available, avoiding excessive leverage, or modestly reducing risk until the data and testimony are out is a more measured approach than assuming a lasting hawkish regime after a single day's events.