diff --git a/CHANGELOG.md b/CHANGELOG.md
index 103cfa4..386910e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,10 @@ All notable changes to the `oxarchive` Python SDK are documented here.
 The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) and
 this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [1.10.0] - 2026-09-23
+
+Versions 1.8.0, 1.9.0 and 1.9.1 are not available on PyPI. This release
+includes all of their changes; upgrade from 1.7.0 straight to 1.10.0.
 
 ### Added
 - HIP-3 breadth above current UTC-session VWAP via
@@ -18,14 +21,26 @@ this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
   Hyperliquid Spot L4 remain live-only.
 
 ### Changed
-
-- Correct Lighter per-fill trade history to the observed global floor of January 17, 2025; exact starts vary by market. This supersedes the August floor documented in the earlier release notes below.
+- Trade `fee`, `closed_pnl` and `start_position` are now returned as `"0"`
+  when the venue recorded a zero, instead of being omitted. A missing value
+  now means the source did not record it (for example fills from 2025-03-22 to
+  2025-05-25), never zero. This is a server-side change and applies to every
+  SDK version.
+- HIP-3 and HIP-4 trades now include `fee`, `fee_token`, `closed_pnl` and
+  `start_position`.
+- Correct Lighter per-fill trade history to the observed global floor of
+  January 17, 2025; exact starts vary by market. This supersedes the August
+  floor documented in the earlier release notes below.
 - Lighter WebSocket channels now support bounded historical replay without
   live subscriptions. Current Lighter data remains available through REST;
   live subscription calls fail fast with guidance to REST or replay.
 - Projected forced-liquidation price-level endpoints refresh about every five
   minutes. This is a measured cadence, not an exact five-minute guarantee.
 
+### Fixed
+- Lighter symbols are encoded as a single path segment in every resource and
+  convenience method, sync and async.
+
 ### Breaking
 - Lighter `funding_rate` is now a fractional, non-annualized rate. Consumers
   that compensated for the former percent units must remove that conversion;
diff --git a/oxarchive/__init__.py b/oxarchive/__init__.py
index 944e8dd..9e3f35b 100644
--- a/oxarchive/__init__.py
+++ b/oxarchive/__init__.py
@@ -124,7 +124,7 @@
     OxArchiveWs = None  # type: ignore
     WsOptions = None  # type: ignore
 
-__version__ = "1.9.1"
+__version__ = "1.10.0"
 
 __all__ = [
     # Client
diff --git a/oxarchive/types.py b/oxarchive/types.py
index cfe0602..7f94b44 100644
--- a/oxarchive/types.py
+++ b/oxarchive/types.py
@@ -116,19 +116,24 @@ class Trade(BaseModel):
     """True if taker (crossed the spread), false if maker."""
 
     fee: Optional[str] = None
-    """Trading fee amount."""
+    """Fee paid on this fill in ``fee_token``, including any builder fee; negative
+    is a rebate. ``"0"`` is a recorded zero fee. ``None`` when the source did not
+    record fees, for example fills from 2025-03-22 to 2025-05-25."""
 
     fee_token: Optional[str] = None
-    """Fee denomination (e.g., USDC)."""
+    """Fee denomination (e.g., USDC). Present exactly when ``fee`` and
+    ``closed_pnl`` were recorded."""
 
     closed_pnl: Optional[str] = None
-    """Realized PnL if closing a position."""
+    """Realized PnL on this fill. ``"0"`` when the fill opened or added to a
+    position. ``None`` when the source did not record it (same cases as ``fee``)."""
 
     direction: Optional[str] = None
     """Position direction (e.g., 'Open Long', 'Close Short', 'Long > Short')."""
 
     start_position: Optional[str] = None
-    """Position size before this trade."""
+    """Position size (spot: balance) before this fill; negative is short. ``"0"``
+    means flat. ``None`` when the source did not record it."""
 
     user_address: Optional[str] = None
     """User's wallet address (for fill-level data)."""
diff --git a/pyproject.toml b/pyproject.toml
index 92737d3..ff2fa38 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "oxarchive"
-version = "1.9.1"
+version = "1.10.0"
 description = "Python SDK for the 0xArchive market data API for Hyperliquid and Lighter"
 readme = "README.md"
 license = "MIT"