Missing major ETFs and leveraged ETFs from symbol universe

[deepentropy]

Problem

The symbol list (yfd.symbols()) is missing major ETFs that are critical for trading system development:

Index ETFs (needed for benchmarking and regime detection):

• SPY, QQQ, IWM, DIA

Sector ETFs (needed for sector analysis):

• XLK, XLF, XLE, XLV, XLI, XLB, XLP, XLU, XLRE, XLC, XLY
• SMH, XBI, IBB, GDX, XME

Leveraged ETFs (actively traded instruments):

• TQQQ, SQQQ, SOXL, SOXS
• TSLL, AMDL, NVDL
• DUST, NUGT
• UPRO, SPXU

Other popular ETFs:

• ARKK, ARKW, IBIT, VTI, VOO

Context

Building a stock scanner for weekly relative strength rankings. ETFs are needed for:

1. RS baseline (SPY) — can't compute relative strength without it
2. Market regime detection (QQQ, IWM relationship)
3. Sector rotation analysis
4. Leveraged ETFs are actively traded instruments that should be in the universe

Currently working around this by using Yahoo().chart() directly for SPY, but this doesn't scale.

Suggestion

Include ETFs in the TradingView screener fetch, or add a separate ETF symbol source.