Renaissance Technologies filed their Q4 2025 holdings with the SEC in February.
This is the fund built by Jim Simons, a mathematician who beat Wall Street for 40 years using pure math and zero emotion. Their Medallion Fund averaged 66% annual returns before fees for over 20 years. The best track record in the history of investing. Here's what they were holding at December 31, 2025, and what those positions are worth today. MU – held $859M worth at ~$186/share. Now ~$768. Up 312%. BE – held $22.6M worth at ~$87/share. Now ~$287. Up 230%. AMD – held $267M worth at ~$211/share. Now ~$455. Up 116%. Source: The Assembly
Breadth within sp500 is narrowing
Source: Barclays, RBC
The Roundhill Memory ETF $DRAM is up 98% since launching 5 weeks ago, easily the best perf ETF out of the gate (while also being the fastest growing ETF- at least to $6.5b).
Source: Bloomberg, Eric Balchunas
The only precedent for when the S&P 500 has been at record highs while fewer than 60% of stocks were above both their 50- and 200-day moving averages: December 1998-March 2000.
Source: Bespoke Invest
21Shares lnc. is going live TODAY 12th of May with their Hyperliquid #ETF Ticker $THYP US Fee 30bps.
Source: Bloomberg, Eric Balchunas
Stocks vs. Housing Performance since the 1970s
Source: Barchart
Megacap Tech gets more powerful.
This Q1 earnings season, the contribution has made an outsized impact. Megacap Tech about 17.3% of the total S&P 500 earnings - close to double that of Q4, 2025. Here, Megacap Tech = AMZN, AAPL, META, MSFT, NVDA, GOOGL Source: Ayesha Tariq, CFA, Factset, S&P
The hyperscalers' combined free cash flow is expected to fall to ~$4B in Q3.
Their free cash flow this year will likely be at its lowest level since 2014, when revenues were about a seventh of their current size. Source: Edward Conard, FT
